I think all the fusion core changes are really good and a long time coming. Observer speed buff should've never gone through so it's a minor, but good revert. With hallucination being as good as it is now, Protoss doesn't need that fast observer so much.
A lot of gating through upgrades is kinda weird and clunky, but it's actually not a terrible idea if it works.
Anyone complaining about the adept upgrade is dumb, who the hell is going to get both upgrades for an adept all-in, and pre-new upgrade they basically function the exact same. If you're losing to double upgraded adept all ins, something is wrong with your play. Likewise, the charge change seems decent as long as it doesn't completely ruin Protoss against timings. Chargelots gain so much defensive and offensive power in the midgame, it'd be nice if their power spike is smoother, allowing Terran a bit more freedom.