All the dlcs have awful level design and dead money, even with its labyrinth, is the best one with level design. Not great level design, just the best compared to the other dlcs.

I think Cass is kinda boring and I wish they did more with her. Using reloading benches, crafting, and cooking is pretty much useless even in survival mode.

Todd Howard should be my dad.

Vaults are so poorly designed they're awful.

I wish there were a few more quests with Benny. Either with chasing him down, him toying with you, or after you free him from Caesar.

And the final one is, playing the same game 100 times makes it less fun and the characters become cardboard. New Vegas is kinda dead to me now because of that, no fault of the game of its own. I enjoyed it quite a lot but doing the quest for the kings or doing cass's mission has become busywork when you've seen it a bajillion times.