Edo Minato was too strong in war arc and hence had to be nerfed (only edo from entire naruto manga ever to be nerfed) that's why kishi removed his arms and hence ability to use vast majority of ninjutus. the dude was still kicking ass with one arm. He fuqing transferred kurama to naruto in an instant (i know bz stole and then Obito did the transfer, but look at Minato's skill level).
The height was, even after losing both arms the man was able to teleport away Madara's tsb thus making him weaker and lent his strength for summoning team 7 and tailed beasts from Kaguya's dimension.
Too powerful dat Minato, over haxxed...he actually deserved those nerfs tbh.