Ultimately my main problem with PoE2 is that every questline felt so incredibly short. I just did a google search for Fallout New Vegas faction quests and:
Brotherhood of Steel, a minor faction, has 5 quests;
Followers of the Apocalypse, a minor faction, have 6 quests;
Great Khans, a minor faction, have 5 quests;
Boomers, a minor faction, have 4 quests;
Caesar's Legion, a major faction, has 20 quests;
Yes Man, a major faction, has 8 quests;
Mr. House, a major faction, has 13 quests;
NCR, a major faction, has 42 quests.
Any quest where you can side with faction X is counted towards faction X's quest count (this doesn't always mean that there's a choice in which faction's side to take).
In terms of areas:
Primm has 7 quests;
Novac has 9 quests;
Goodsrpings has 11 quests.
In terms of main questline:
Caesar's Legion run has 4 quests;
Yes Man run has 7 quests;
Mr. House run has 9 quests;
NCR run has 5 quests;
This is not including the 2 introductory quests (They Went That-a-Way & Ring-a-Ding-Ding)
F:NV's shortest questline is 5 quests. My memory may be getting hazy, or maybe my game was bugged out, but I think the longest questline I saw in PoE2 was the main quest. Upon checking, it has 7 quests, this counting the introductory one.
The faction questlines for PoE2:
5 for the Principi;
6 for Royal Deadfire Company;
7 for Vailian Republics.
I felt PoE2 had tons of sidequests that were left hanging. I keep moaning about this but it really is the most disappointing aspect of the game. Arkemyr's quest is the most damning example of this.
FNV had 18 months in development with a ready-to-go engine. PoE2 spent, let's be generous, 1 year in engine development work. That leaves 2 years for game development. What happened? Where did the quests go?