Instead of being eager to get one character through the entire game, to then dread doing it all over again 5 (or 3) times, how about picking one side, accumulate your 10K faction, have all 5 (or 3) of your characters accept the befriending portion of the faction (without trading in your faction for amber/jade, if you can resist), then enjoy the second half of the game for a longer period of time. (Rather than having to feel like you are backtracking with your other 5, or 3, characters). You don't need to farm any faction, ever, to progress all your characters. One character alone can get the rest of your characters through to the end. And if all else fails, set your own goals, rather than relying on ANet's team to create your imagination every step of the way. Of course, this is my opinion, but Factions is a very refreshing element to a world I came to enjoy over a year ago, and I'm still finding new goals (no, not the titles) for myself every day. And as far as the amount of content Factions provided compared to Prophecies, look at it as simple math: A new chapter every six months, Prophecies took 1 year (25 missions), Factions is going to take 6 months (13 missions). Relatively, this is the same amount of content given the time span. And we got Sorrow's Furnace in Prophecies to tide us over, which I feel was a very nice gesture on Anet's part. Oh, and don't forget the holiday events!
