Of course you dislike the nerfs cuz you are an Io player. Let me tell you the perspective of a high elo master/GM dps/flank player:
If I'm playing against a Jenos, I can normally kill enemies through the Astral mark, if I'm playing Androxus for example. Jenos is pretty weak and defenseless himself and dies in 3-4 shots and a punch for sure.
If I'm playing against a Corvus, his pocket is pretty annoying to kill through, however Corvus himself is pretty weak. I can easily kill him normally if I get the jump on him before his teammates can help him, and even if he tries to tp away I can just chase and finish him.
If I'm playing against Io, we either lose TONS of point cap, or if I try to kill her, I will have about 3 enemies shooting me immediately. Even if it's only a 1v1, she just hides behind her dog, and I take not only damage from her but also form her dog, and in total it really HURTS. Not only does she have 2 jumps during which she can still shoot (which can't be said about Corvus TP), but also an "I win button" ultimate. It just takes too much time to kill Io during which her teammates are normally all looking at me. And killing enemies through her healing is basically impossible early game, and late game it's hard as well especially if they pick up Haven. So I can NEITHER kill the enemy DPS, nor can I kill Io, and that's if I hit all of my shots. All in all the enemies can play extremely safe and protect their squishies WHILE AT THE SAME TIME getting tons of free point cap, which adds up to being extremely busted to play against. Just my 2 cents...that's why the nerfs are more than justified