Why people says AST is bad?

[chumsy]

Hello!
My ast is only 53 but that is enough for see his potential. In my opinion AST dont need a buff/nerf, is fine right now...

Healed as both AST and SCH, could tell you immediately that AST felt weak, at almost the same iLvl gear. MP ran out quicker, and recovering from large AOE damage was more difficult, the main issues i see.