Speaking clunk and playablility, not balance issues per say like tweaking the numbers and such, it's pretty decent.

The spear stands out as clunky. There's situations where it's good. Start of a fight. Ninjas. If the stars align and it comes up with your luminous aether cd. But mostly you throw it out and hope maybe it does something or you do your best to avoid it.

Shuffle drawing the same card is the worst feeling.

Other than that everything's pretty smooth and plays well. You don't need to tear down the whole system and rebuild it or anything.