If you know how to deal with the new affix, it actually reduces the difficulty of a dungeon, so a 10 can be easier than a 9 because you skip some harder trash.
But if you don't know, and don't have a proper route with obelisk skips, just killing the minibosses on the spot will take like 5 mins or so. You will also probably end up overpulling %, add in a wipe because the tank didn't kite, or people ate bug explosions etc, and it can end up being much harder.