Let's say it, with all the outfits around you can't tell the profession of the opponent by the look of it.
Everybody looks at the tag or skills and there is always the option to switch to standard armor class models if someone needs it, so, just give us all the options!
The best part of it is that Anet could create less but give everybody more. Let's say that they want to release 1 new armor set, they always need to release 3 different sets blocked by armor class... why not having instead 3 different armor sets that give much more options to the players?
In the end if you like heavy armor on you warrior you can always opt for that choice, nothing will be taken!