Wow, thanks for this huge feedback! Glad that you liked the game.
The crash caused by pounce on shielded elite, that you mentioned, is already fixed in version 1.0.2. The other bug with chain lightning I'll definitely look into.
I was wondering if players would be able to discover small non-obvious things like healing opportunity on the final boss for the beast. Kudos for figuring it out.
I assure you that every attack of the final boss is avoidable. Final phase is tricky indeed, but it's possible for every character to beat it without taking any damage.