>>34774793I don't think you're wrong, per se, but the degrees of "minor" vary a good deal between those grouped gens.
Like, I wouldn't put Gen 5's Hidden Abilities on the same playing field as Gen 3's complete addition of Abilities -- I'd say Gen 5's changes are much less by that notion. Triple Battles and Rotation Battles are more notable, but it's hard to say now if those are going to be changes implemented to be ongoing given they're not in Gen 7.