so it seems the 1100% exp has been ninja nurfed after a few hours of it going live as people we 2 manning the trash and getting more then intended exp..
instead of giving mobs huge exp why don't you just give the quest for finishing the trial a lot more exp? 50-100k exp for AA or Hel Ra and more for SO? (as it takes 5 times as long to finish)
This gives trials players the ability to play what they want to play and stops grinding the 1st mobs in trials.
You could also do this very easy change to daily undaunted quests, PvP kill 20 player quests and DSA (if you give it a repeatable quest)

another option is to up the exp from all bosses in trials / DSA & dungeons (but I'm sure people will just farm the 1st boss in AA if u did this)
In my opinion this is sorely needed for ESO's endgame..