The reason SWTOR failed has nothing to do with the fact it was a sub. A lot of people will happily pay if the game is actually worth it. They started "hemorrhaging" subs when they decided RP fluff was more important then game content, including su…
As you pointed out, in beta we've been capped at 30 as of now, alpha being uncapped. Later on mages do some serious damage, not to mention add a lot of much needed CC. I'm sure they'll tweak mage dmg up a bit, but complaining about not doing much …