Thanks so much! I already have ideas for some of these issues. One of the first big changes I have planned is that the late-game bosses are going to get much, much more health to make first-turn kills a lot harder (and therefore glass cannon builds a lot riskier). I also plan to add more Curios that aren't energy-restorers to the pool, so it'll be less likely you'll be fully decked out with them by the end.
Glad to hear you liked it! Didn't expect someone to beat the final boss so quickly!