Lost Dimension sounds really interesting (the traitor(s) among them mechanic of the Zero Escape series with tactical RPG gameplay), I'll have to pick that up when it is on sale.
So far its even better than I expected. The story and dialog for the max affection is really cliched but after every battle they have the scene where all this dialog appear. Has that cool zero escape feel which makes you really question who could be the traitor.
The battles so far are fun, closest explanation would be a dumbed down valkarie chronicles with blander environments.
I'm enjoying the skill trees too. I like how you can decide whether one player can be either a healer or a status changer. My favorite character so far is the one that can teleport. He has a unique animation in battle that os reminiscent of the dash animation for Alice character in the ps3 game. Each character feels unique enough but I pretty much settled on my party when I found out who the most op characters are.