I don't dislike how the Banshee works right now, but if you feel it still doesn't fit you could try to make it attack with the "Haywire" structures only, and even remove the speed upgrade if needed. But it is ok right now, I don't see it bad.
Now... about the Stalker... there were some good posts on the forum but they are lost now, so I will put it again here:
Please, keep the Stalker ingame, and make it attack only ground if you need, with the values you wish (Armor, Shield, Atck Speed, Mov Speed, Atk Range). What is the idea behind this?
Blink is one of the best micro for units in the game, and BlinkStalkers are really cool and fun to use, but because there is the Dragoon as well then they should only be able to attack ground units, while having the upgrade to get high ground vision (the can have the same range upgrade as Dragoons if you like)
That way they won't limit the Zerg gameplay, and it will as well increase the Muta play when you go Stalkers insteadof limiting it like happened when they were attacking ground AND AIR units.
I don't know who are the people testing all these stuff, and I know you are quite bussy these days Xiphias, so I hope you can check that soonish, and if I can help in something tell me please, but seriously try to put the Stalker back in the game