The daily raid content so far looks to be a lot more than in 3.2 too (and hopefully is fun/worthwhile to grind). So there's a lot of potential for a great patch to come (and in a sense they decided to give us part of it early too).
I don't think this is 'more new stuff for free' by any means though. We do pay a subscription fee after all. If we didn't we could expect something like Diablo 2, which had no new content pretty much throughout it's product lifetime.