Well this morning I wrote a much better 10 paragraph essay on the game but the power went out and I lost it, so I'll just rewrite a bunch of shit.
Dawn of War 2 is disappointing because the campaign sucks. There is basically one type of mission, with a second type of mission that is just sitting for 10 minutes while your marines massacre enemies as they come into range. You start off at the same point on one of maybe 7 or 8 maps and walk across the map killing everything until you get to a boss fight. I understand what they were going for but the boss fights are long, boring, and annoying. Some of them are ridiculously balanced, like the fight against the Eldar Sniper. He has a billion health and randomly teleports across the boss arena. The idea is you are supposed to get to him real quick because he starts charging a snipe attack, but you just don't have enough time so every 10 seconds or so he teleports and then snipe-instagibs one of your soldiers. You are reliant on random drops for good equipment such as flamers or power weapons and you are just fucked if all you get is Scout Armor over and over again like I did because then you start having to fight boss battles against tanks. If you don't have a power weapon the only thing you can do is run your squads around waiting for your meltabomb cooldown to finish.
The game is ridiculously easy (except for several retarded boss fights) and the balance in the campaign is incredibly poor. For the first ten missions your Tactical Marines instagib Orks in a single shot and then after that the only person capable of doing ranged damage is your Devastator squad, which is relatively useless until you rush and max out his ranged stat so he doesn't have setup time. I'm playing it through again since I got the French language pack with my Tactical squad kitted out for melee and they're much better that way. At the end of the game I finally got a missile launcher as a random drop, so dealing with tanks would be easier, except I already had my force commander with terminator armor and a thunder hammer so boss tanks and Carnifexes were no longer a problem (normal tanks are instagibbed by your meltabombs). Most of the special abilities you can get are just not that good, the only one worth equipping is the Tarantula Turret. The artillery barrage does less damage than a frag grenade (which is instarape and will kill a dozen or two enemies in a single attack) and the invulnerability power doesn't last long. The only thing that can even hurt your marines is the bum rush attack by boss tanks, and spore mines. It's kind of ridiculous, you can mow your way across a map and encounter 2 squads of spore mines and not be able to kill them fast enough so they explode 2 squads of marines before you can blink. It's kind of silly.
Overall the campaign suffers from severe balance problems and a severe BOREDOM problem. EVERY fucking mission is the same, except for the 5 or 6 defense missions you will do.
The item system is actually kind of neat and if it weren't reliant on completely random drops like Diablo fucking 2 it would be better. You get a suit of Terminator armor at one point in the story, and depending on who you give it to you get different stuff. You can give it to your force commander, or give it to your tactical marines for normal terminators, or your assault squad for assault terminators, or your devastator squad for normal terminators only the sergeant has an assault cannon. There's no reason, though, to ever give it to anyone but your force commander because unless you have a really good weapon item they will be much better in their original forms. This is double especially true for your Assault Marines because you lose their absolutely devastating assault jump which, as you upgrade their stats, knocks everyone about, supresses them, AND makes your squad temporarily invincible. You get a teleport assault instead which doesn't knock anyone about or suppress them, though you still get the invulnerability temporarily.
The voice acting is good but nowhere near as good as in the original Dawn of War and its expansions (also the French suck at doing Ork voices, complete failure). I went on Youtube to watch a few cinematics from the original to make sure I wasn't wrong. The cinematics in the game are neat, but you see them EVERY time you fight a particular type of boss. Is the boss a Lictor? Then you will see the same video of the guy dicking around in the woods with a camera Blair Witch style and then getting killed.
You spend almost the entire campaign with 5 squads, and you can only use four, and since I would always rather have tactical marines and assault marines instead of scouts I never used them. Later on you get a Dreadnought who dies very quickly and requires an accessory slot on one of your units just to keep him healed (and it has limited charges), he's just not good. The final mission is incredibly anti-climactic as I had both terminator armor and a thunder hammer AND Rapetron Angelos who is given to you, AND my fully kitted out devastator squad. I killed the utterly generic final boss in about 3 minutes.
Severe balance problems (most items and abilities are useless, after early game ranged damage is too low except from devastators (and for some bizarre reason plasma cannons do 1/4 the damage of missile launchers and fire 1/2 the time AND knock back and maybe hurt your own soldiers), kind of lame story, boss fights are a dumb idea, lack of different types of missions, and the driving force in this game is to get phat lewt for your marines instead of advancing the storyline. It's just really disappointing.
Anyways a lot of the ideas they had were good and could have been great additions to a more traditional type of gameplay, but I can only fight my way across the same handful of maps and fight the same generic bosses so many times before the game gets super boring.
Also, out of the 5 squads you have, only one marine hero guy is bald which is heresy.