What i saw from your earlier posts but you didn't mention it exactly is that you were lvling back then, ain't that true? And its true that Sents have a lot of problems PVPing before 40 because you don't have some few really important skills and you don't have acces to last ability in tree (Sents are in no means able to play hybrid builds).
About lack of AoE. It's SINGLE TARGET DPS class, in terms of AoE there is Commando who is really hurt after 1.2 AFAIK.
This thread made day, I must admit that x)