You forgot to add AI5 Needs more Buff for this poll.
I agree completely. I wouldn't mind AI5 being up to 50% upgraded. Right now, when playing AI5s, the strategy seems to be either using a very simple strategy (like a fire stall), or use a FG deck that you just haven't finished upgrading yet. I would love to see AI5s get even tougher (even at 50% they would be much easier than FGs) so that one could actually make a deck specifically aimed at AI5, upgrade it fully, and have success winning upgraded cards. The 200 HP thing is the important factor with AI5. Games take too long for it to make any sense to grind them for the victory electrum. But at the same time, winning upgraded cards from them is so difficult. I would love to see a higher % upgraded so that they would be viable for grinding. Something like 1 upgraded card per hour (on average) of grinding with a fully-upgraded, optimized deck for AI5 would be less electrum than a good FG deck, but you would get more wins and probably more score.
Right now, AI3, T50, and FGs are all viable grinding options. It doesn't make much sense that AI5 really isn't. I don't mind gradually escalating though. If this buff turns out to be enough, then great! If people are still complaining about how worthless AI5s are 6-12 months from now, I'd love to see another buff. I think this is a great example of zanz listening to the community and changing the game in ways that make sense.