Family Name: Von_Chicanery

Region (NA/EU): NA

But then players could see which class its good or  bad (don't mind that noone invite bad classes into NW/Siege guilds) and PA doesn't want it. That's the official respond PA gave about why we can't see damage numbers btw.

That may have been their "official" response, but its pretty obtuse on their part. Everyone knows what classes are strong in ball fights/siege and pvp'ers generally tend to abandon "weak" classes in pvp anyways.
Moreover, why show in it AOS and not in NW/Siege? My guess is perhaps it might highlight how broken some classes are once higher gearscore is acheived in game? 
Even if that was the goal, why omit structure damage, buffs/debuffs/ and  healing performance?
At this point in the game, I'm fairly certain that NO ONE is under the delusion they'll ever really balance classes., so hiding that ineptitude is a moot point. Some folks just like to evaluate their performance based on something other than KD or horse kills(kekw)

I think this will consume much server resourses, so we nont need it