Can we remove gimmick bosses from end-game?

Just got wiped by that chained-up guy with the ballistas when the ballistas didn't have any effect and he couldn't die. I hate this fight even when it works. As a frostwolf invoker it forces me into human form and resets my rage every time I have to interact with the mechanic.

There's more that I can't remember the name of but normal maps shouldn't have multi-stage boss fights or re-used campaign bosses that have a script. They are fine for event type things like citadels etc. but having to go through that crap every single time is annoying as hell.