I saved all my characters, left them stranded at Unwaking Waters, and then just plowed through the end game on all three in one day. It was nice kind of. Instead of going through the whole game on each character, I stopped for each one when I'd reach a certain point, and then work on the next. Granted, its made Factions take a long time for me to beat, but I find that I didn't get bored so easily as I did with Prophecies.
Now time to repeat that process to get my 3 new Canthan characters done with Factions, and then maybe even Prophecies. I think I've got enough time before Nightfall comes.
I think, whether the expansion is coming too soon or not is your choice. As in, I could have been done with Factions a while ago, but I kind of staggered my playing (and bought Oblivion) to slow me down. I didn't need another Prophecies that I would get bored with so fast. Theres still a lot I haven't done in Factions. I made every character go through the Kurzick side, so that when I'm done and bored with nothing to do, there the Luxon side will wait for me.
If you play casually, yeah, Nightfall may be too soon, if you're hardcore played through Factions in two days, then Nightfall probably couldn't be any sooner.
