If you want a 100+ hour RPG play an MMORPG. I've clocked an entire year+ (yes 8544+ hours) playing EverQuest. Non MMO FF games can do fine with a solid 40-60 hours, of course there will always be min/maxers who spend 120+ hours on a single walk-through but they are nuts.
I am actually ok with waiting half a decade for their Flagship FF. As long as they also put out RPGs (or even FF spinoffs, though FFCC sucks) every 2-3 years. And yes, every 2 to 3 FFs they need to upgrade the engine.
Despite having to wait so long for FFXIII, we will play it and love it and thank SE for giving it to us.











