There is a cap on how much AA you can spend.
SoE can't even get the replacing spells with the next tier working right ans you want them to start replacing skills for every tier randomly? Yeahhhh.
TBH be lucky you have groups. If soe used your ideas then you probably wouldn't be getting in any.
Some people like to feel powerful and go back to old dungeons and rip stuff up that killed them so many times when they were noobs.