I wasnt saying anything about the format
but overall.. I disagree with this, it just seems to me that you are trying to start a new wave of nernernernerfffs and nerf any card which annoys you to nothing.
Is it too strong? Use it.
Don't wanna use it? Well you know about it - and you know, opponent has 2DL+another domain, and is not playing many creatures .. probably, there is Soul Plague coming. I'll drop a site and he will secure for me with his own card. Or he will be forced to go out, fight for it and delay casting of Soul Plague.
or you see opponent with 2 domains hoarding flux .. just save and creature dis you have instead of casting it on that trained dwarven warrior who is trying to bite it out from you.
I dont think there is any card which needs to get nerfed/remade right now, you can play around all of them. (I agree though that some are more annoying than others, but thats about it.)
IF anything .. I'd suggest to make another expansion, which would bring in the mix new cards dealing with those you see as 'problematic'. That would make much more sense to me.
(Say - you get some of the changes you suggest realised .. in a few months .. new expansion! And those cards we would now spend months tweaking would suddenly have to get changed again..)