Marauders are not overpowered because they out damage other classes, marauders are overpowered because they have the best pvp utility in the game right now (undying rage +pot, super low cd force camo to avoid death, snares, etc., bloodthirst or whatever the big 5min cd is, gap closer, cloak of pain, saber ward, and there are more smaller ones that may be spec dependant etc.--this is not to mention the multiple ways Maras can lock down a caster with several different ways to interrupt
As far as PT powertechs go, I am not sure about their defensive and offensive cds, but for my V70 merc pyro, I have one defensive CD (my bubble), a knockback, a stun, a negligible selfheal, and my insta cast/no cost cds... but it's ok because I can kite you until you charge again????????????? lol
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My problem is not with damage... my problem with maras is with their insane utility at ALL times... my merc doesn't even have a true interrupt ability...