The thing would be to make damage combos more sensitive. I was playing a quest with a custom boss, and you could avoid the damage combos by being halfway between 2 combos. It made the custom boss loads easier than it would have been.

I don't remember hearing anything like that... is it possible the quest maker didn't have the linked combos rule checked?

As for timed pit warps, it's still not entirely clear how they'll work, but I'm sure whatever is implemented will be beneficial to all quest makers.