Stripped of all his power and even his names, he can never be summoned again, and Nicol Bolas is no more
The more spells you cast, the harder it is to retrieve what you want, and thats where redundancy helps, with cards like Opt, Consider, and Preordain
Loran of the Third Path does double duty and can eventually benefit from Archangel of Thune and similar effects
Gitaxian Probe A peek at your opponent's hand for virtually no cost and a fresh card to boot, Gitaxian Probe offers insight and advantage in formats like Legacy and Vintage
#2: The Mycosynth Gardens When it comes to seeing competitive play lands have a natural advantage, because basically every deck needs to run a bunch of them to be able to cast their spells, which greatly lowers the opportunity cost of playing non-basic lands with special abilities
On the bright side, several of these generals did create archetypes that I think players wanted to exist within Commander