I don't think that that is a good reason to call this update good. I don't like being told that what I see as reliable being made worthless because it is "2OPPLSNRF". I just don't see that as good game design. I would have found some of these strategies anyway despite the update, just like you said. So the only reason this update is good is because it forces you to do something that you had the option of doing pre-patch anyway. Saying that this update is good because of strategies that hypothetically could have existed pre-patch means that this update is completely redundant. Yes, certain things needed to be nerfed, but not to the extent that CC nerfed things.
I also believe that what they did was stupid because, due to the incredibly limited resources, if you try to set up a tower build, it could be messed up by the way that others put their towers, which can become a very frustrating situation.
And even if everybody said they wanted the update to be reversed, Cube wouldn't listen. They really don't care unless you stroke their ego.
In regards to mob strategies: You cant do anything really. There are about 3 tiers: 1. trash (zombie & giant(both post-patch)) tier, Average (though they can be mistaken for trash) tier (skeleton), and God tier (Literally everything else.) And within those teirs, there isn't really much variety, at all. You have tanks, unique stuff, and one support which can be mowed down by 1 mage potion even at lvl 5.
In regards to XP: really, they didn't need to nerf XP, at all. All they did by nerfing XP is that they made the game's pacing infinitely slower.
In regards to towers: due to the nudering of certain tower strategies, the amount of strategies you could use is just about 20-30. For one mode. Oh? you want to play the other, more interesting gamemode? THEN PAY US 140$(Survival mode should NOT be stuck behind a paywall, especially with an achievement attached to it.)
So yeah, except for a few necessary nerfs, this update, to me, was one of the worst things they could have done.