Even skipping mobs in AV/DD can result in a run that's 30+ minutes. Leveling players will only have to run those dungeons 5-6 times, meanwhile someone doing zodiac and having terrible luck could have to run those dungeons 10, 20, maybe even 30 times. If they want to go through it a bit faster by avoiding extra trash, let em. The only thing I would hate seeing people miss out on in terms of exp are those mini-malboros in AV. Those are fantastic exp vs time spent killing them.

Of course, if people are genuinely concerned about getting the most out of their exp/time, then they'd be doing first room DD/AV pulls and wouldn't even have to compete with Zodiac players and their item drops.