With the exclusion of the Big Town/Little Lamplight quest, all of the quests you cited are generally longer than the typical FO:NV quest. Granted, I prefer FO:NV's design, but I don't think Fallout 3's quests are as bad as you guys make them to be, not by any stretch. Even Vince D. Weller praised them, and there's a reason.
than the "typical" new vegas quest sure, but you're overlooking the fact that if NV has 100 quests, and 80 are short, and 20 are long, thats still 10x more quests and content than in F3, which has 20 long quests, and no short ones. (note: numbers are made up)
if you're saying that you wish new vegas had less quests, so that the long ones stood out better, fine, but thats not what most people wanted in a new game.
I just wished the balance was skewed in favor of more involved quests. Less quests but longer overall. I'm still pretty pleased with the game quests but I think they can still improve.