I noticed you can't rebind the item hotkeys, maybe he's talking about that? I assume they just haven't gotten around to it yet. Actually, how does that work with a controller? Must be some awful cycling thing?
Regarding the whole easy gunplay of shooting dudes as they round corners and pot shotting turrets from far off, that's mostly a symptom of having more firepower than the enemies can handle. Later on when you can empty a clip at a tough enemy and need to back up and reload while his three buddies keep coming, or even the enemy himself if he's a badass, things get hectic real fast. Also, some of the turrets spawn flying drones you can't directly attack, meaning you can casually wait behind cover because they'll rain lasers on your ass. Plenty of other things can throw you for a loop too- teleporting enemies, healing drones, slow but obnoxiously accurate tracking missles that will circle you for quite a while unless you lure them into a wall, preferably far enough away to not take the splash damage. Oh, and there's the suicide bomber drones that don't quite die after attacking, and the more elity guys who do some sort of teleporting grenade thing like the mortar turrets except they do it even without LOS. You can also use enemies against eachother, because they'll murder eachother or even themselves with friendly fire.
Weapons have been incredibly varied so far. There are the usual suspects, shotguns, full auto guns, sniper rifles, pistols (only as starting weapons so far?) and burst fire rifles as well. You can mod these to have full auto or semi instead of their default, along with a bunch of other things like refunding ejected ammo or only being able to eject an empty clip, or having massively reduced recoil while standing still, or making your ammo pierce enemies or ricochet off walls. There's also more unusual weapons, like rocket or grenade launchers, whether dumb fire or enemy seeking or guided by your cursor. And two different kinds of flame throwers so far (status effects are a thing, I've seen (and suffered) burning, acid, stun and radiation so far), a nailgun that regenerates ammo slowly all the time, a laser rifle that regenerates ammo super fast after a short delay, a bolt action sniper rifle that not only pierces enemies but ricochets like 5 god damned times and terrifies me because shooting yourself with ricochets is definitely a thing, even with normal guns against certain kinds of terrain like the metal shipping containers.
This isn't even getting into the passive and consumable items you can carry something like 8 of at a time (they do really cool shit, often with a drawback for stronger items) and upgrade for a fee at certain kiosks, which can also sell them or do various weird shit, the passive class abilities you can choose from the start and acquire a few more of along the way by using a consumable item, or the basic stats you can upgrade from certain chests, or the random mods on weapons that do things like nerf their damage but give them regenerating ammo or just give them massive clip sizes compared to default. There are also effectively cursed chests, alternate difficulties of levels to select sometimes, optional quests within levels, timed chests that are very difficult to get but can be opened later IF you have a keycard.
Oh, and not only do enemies need to reload just like you do, you can see their remaining ammo for almost all of them, and how long they'll spend reloading when they start to.