Personally, I don't like it.
For one, it's a Shadow Hunter clone. And in my playtesting, a weaker one at that.
For another, it's very laggy. It can take upwards of 30 seconds before it finally decides to play an attack animation.
Thirdly, it doesn't... feel like a time class. Sure, you can rewind your combo, but that's it. Other than that, it seems more appropriately a cousin to the Technomancer.
I might be able to handwave the whole Shadow Hunter clone thing if I felt it were worth it... but I don't. I know that the one of the first design notes posts on the class said that it'd be built similar to the Shadow Hunter, which would be excellent. Make it it's own thing that has combos, but not the exact same combos. Also, I've found that, as I said before, it's weaker than the Shadow Hunter. Particularly the magic skills. When before one could heal for 1/4th health and deal around 400% weapon damage, you're doing the same with this copy at only 120% weapon damage. Through three turns, roughly 40% weapon damage per turn. For such a long buildup to the heal, you're better off casting higher damaging buffs and debuffs, and using a healing potion when needed. The rest of the attacks, though neat and flashy, still do around the same damage, if not less, than the original Shadow Hunter.
I tried using the armors back to back. Pretty much every time, Shadow Hunter flattened the same foe in less turns than the ChronoZ.
So.. yeah. I don't like it.