Companion battle style option (stealth , sniper , etc)
To be able to see ur rifle across your back
Longer mission in factions
Reset perks by cost of caps or any collectible
Maybe new enemy to face with wat ever faction you choose
Upgrading ammo to explosive poison etc
More power armor looks (x-01) gets tiring to look at after a while
Maybe upgrading regular weapons to have legendary perks
This is just ideas i was thinking let me know wat you giys think