Current system works better than an A tab - at least this way its controlled: the moment you put in an A tab, everyone starts making their pvp gear look as ridiculous as possible and gear/silhouette recognition goes out the window.
So frakin' what?
PvPers are always talking about how much more manly they are because PvP is so much tougher than PvE. PvPers can get over not being able to ID someone's class at a glance instead of trying to cherry pick their targets.
Besides, an Appearance Tab would not allow Consulars to wear heavy Trooper armor, or even heavy JK armor. You can only put into the A-Tab what you could normally wear.
So what was your objection again?