Because god forbid people aren't doing a dungeon with 40 ilvls more than the requirement.
Thats already in there. Its called a wipe. Everyone dies when it happens.
It seems like you're just upset that you can't do LotA quickly. None of what you're suggesting will help with that. If you want to get through LotA quickly, then you should be asking for changes that promote cooperative play, not competitive. The fastest/best runs I've ever been in have been where all the alliances helped each other out and weren't competing against each other.