Exo suits that act like they do in Advanced Warfare: No armor options(You can still wear your outfit), but they have unlimited sprint when worn(No AP drain when sprinting), same movement speed as without power armor, and a special jet pack that instead of letting you fly enables you to "Exo jump", or basically jump up high into the air, twice. Obviously, you still don't take fall damage, and you cannot breathe underwater like with the power armor. Thankfully, our forum member Kazzy already uploaded quite a few AW assets, so once the geck comes out, we can make this a reality. I would also love the implementation of AW armor pieces, so you can really mix and match like in AW. If someone can take my go to outfit, the Fuel outfit and all the pieces, I will seriously be thankful. I want that outfit in F4.
Other than that, the other 2 power armored suits I would like to see recreated would be the Spartan Suit(Rechargable shields need to be taken down before your armor and health start going down) and Iron man suit(Faster Fusion Core drain, but you get all the abilities of the iron avenger, including his arsenal of weapons, free jet pack with no fuel drain, Repulsors that don't drain your ammo and advanced UI, amongst other things). The goliath suit in AW has the right idea, thankfully that feeling of invincibility is mostly recreated in F4.
But what I am interested in is if somebody will make a full pledged MECHA mod. I mean actual fighting robots like you see in japanese manga and anime, giant fuckbots that make Power Armor look like fancy toys and tower the biggest enemies in the game. Obviously, you will have to take them off when entering indoors and going into boston downtown, but the large, open countryside is yours for the taking.