I think the same as Alhanelem. I don't really care about the values right now, this is an alpha version, nothing has been fully decided yet when it comes to TP costs, regeneration rate and so on.
But when you listen to Yoshida, it really looks like he wants TP to become like in WoW and similar MMOs. The GCD is what will restrict us. Not the cost of abilities. I can sense the same battle mechanics coming, with WS/Spell rotation, very short CD for "special" abilities etc.