I think all four of these decks are headed up by powerful generals, but its possible that Aminatou might get overlooked by being so outside of the norm
This is only possible when the card draw is cheap, immediate, and opens the doors to the mass removal occurring on either players turn
In its absence, follow her
Its sacrifice ability costs two mana, which significantly limits how much you can use it if you also want to cast spells in the same turn
While Trinisphere is one of the strongest artifacts out there, you surely wouldn't run it in a Jhoira, Weatherlight Captain artifact storm deck because it would grind your deck to a halt
Weak to fast aggro decks Needs time to set up the combo, which can be risky against aggressive decks like Mono Red or Mono-White Aggro