Boss battles should be focused on puzzles and require you to use multiple items to be able to damage It. There could be a few exceptions though, such as final boss, Ganon could have more than 1 form, but at the last one It would be pleasing to not have puzzles and just regular sword fight, It kinda fits the final battle much better. I'm kinda hoping for another WW like final boss though, for some reason, It felt fun and rewarding fightning ganon with zelda helping me with the light arrows, It was sad how easy that fight was though, would've been better if Puppet Ganon was part of the battle instead of a boss battle before It.