I can't stand the tesla armor the enclave wears. the stuff is so ugly. T-51b or Hellfire.
The only good Enclave power armor was the armor from Fo2. In FO2 the Enclave armor was known as Advanced Combat armor and how more resistance to damage than the T-51B. Another thing to mention is that the damage mechanics were much different because in FO1 and 2 you could become bullet proof where as with FO3 and NV the armor in general only exists to reduce damage taken.
I also wish that Bethesda touched up a bit more the Brotherhood of steel structure and organization. You had the scribes which wore robes and spent all day designing weapons and doing science stuff, while the knights were given combat armor and spent most of the day manufacturing stuff, while the paladins were given power armor and weapons to go out and fight and recover tech, while the eldars told everyone what to do from the safety of the bunker.
I also hope they ditch that stupid concept of good and evil. It's too generic and doesn't fit into fallout. The BOS was only concerned with pre-war technology and that was it. They became selfish and were basically hoarders. The Enclave only the other hand was kind of imba to begin with and only served to be the bad guys with cool armor.