Let me put it this way. I am 35. My time is rather limited. I have a Sorc at 60, which is and has always been my main and only toon at 55(before 3.0 hit), and which i enjoy it immensely. During the 12x, i managed to see the storyline up to 55 of a Bount Hunter, Imperial Agent, Sith Warrior and Jedi Sage. Once the 12x dropped, i simply stopped doing more storylines and or generally levelling anything except my Sorc.
As it stands i would be willing to pay for a toggle 12x mode, no strings attached. I've been reading conditions left and right in this thread, and while they're all decent as ideas, i really think it should be completely free of all condiitons. I have faith that people eventually learn how to play. If not, they simply will not go very far. For the rest of us, guild grouping is the way to maintain our sanity against pug's