Myth 3 is definitely a whole new show.
I agree though that the Myth community is pretty much shattered. A quicker release of Myth 3 might have been better suited, alot of people lost interest with new temptations constantly arriving. I've heard alot of people mention disappointment over the new systems and graphics, saying they appreciated the previous style of game play more. I think both have their virtues, personally i loved the sytem of Soulblighter and rank it as the number 1 Myth game for gameplay purposes.
Do we really need to see each and every soildiers facial expression? With some of that extra programming might we not have ahad another whole unit or several more levels??