Personally I'm really invested in seeing this do well (namely becuase this is the only gooner mod i've seen for a game that actually tries to be balanced and interesting) so here's my quick take.

1 - Mechanics are unreasonably complicated IMO.
I think this could be solved by removing most of the custom HUD since that info is already shown as buff/debuff icons, and simplifying some of the mechanics. Namely, maximum bounce stacks isn't really used in many cards, and it isn't particularly relevant when it is, so I think it wouldn't hurt to remove that stat and just have it hard written to generate 1 bounce card for every X Buxom.

2 - Generally a little weak.
It feels hard to use her effectively since a lot of the cards you can take just kind of. Don't do much? There are little cards that really feel rewarding and getting to 30 Buxom feels unfairly hard given the fact it removes your block.

3 - The dead draws go INSANE
You pretty much need to build around getting lots of Buxom stacks to get anywhere but this regularly results in 3 dead draws PER TURN which can get really annoying. I really think bounce generation should be nerfed so you aren't getting as many at once (and/or give her more draw control)