So, 2.5 hours in, I'm quite enjoying the game. Very early impressions, of course, but the combat challenges so far are great, and the fact that you can customize each character with 4 different classes and several different specializations within each class, and then different playstyles within each specialization, as the way you spread your stats can change the way your character plays, is all good in my book.
I'll have a more elaborate opinion when I hit around the 20-hour mark, but so far it seems like a step up from Tower of Time in every aspect, including graphics, gameplay, plot setup/premise, voice acting, replayability, personalization/customization, fun.. in short, for now I can't think of anything Tower of Time did better than dark Envoy.