Thanks for the detailed feedback, most of these are already on the to-do list, it's just a matter of time to get to them
To address some specifics:
The Guard on level 2 heals himself (even more if you try to kite him!), but is a massive pushover if you stand still and click him down. It's something like 60 max health, but +15 health on heal (doesnt go over 60, though)
Quickswapping is planned - it's the most requested feature by far
Garlathan Magicfeast is (like all other non guard named enemies) randomly generated, but the name makes me think its the invisible faceless guys on Lower Dungeon 2. Those are my favorite type of random boss types, since they really don't mess around!
Thanks again for your feedback, and I'm very glad you enjoyed yourself!