This sounds like a great idea. Not only would it be fun to discover how to use end game specs in solo content, but it would also be a chance to do something that furthers your end-game character along without having to group up. I'm not a fan of daily quests. Something about the mentality of a lot of minorly rewarding quests doesn't appeal to me. But if there were a solo flashpoint that gave you rewards equal to maybe doing an hour of dailies, I would be much more behind it.