I would love to see a much longer boss fight. My hero defeated the boss almost as fast as any of the normal enemies so it didn't even have time to switch to a third attack style. The boss was the most exciting part of the game for me since it puts to the test all of the work you did throughout the run. A longer boss fight would reward players that were able to keep gear for each style and punish players that did not. Depending on the damage scaling, it could also be a motivator to create a stash of otherwise unnecessary healing potions.