I though I've read you agreed on Mnemonic implicitly, my bad. Anyway, what I'm argument is most of your play time, you'll be playing without enough talents.
You said that we had to choose 7 talents. Divide this by 2 and you get 3.5 ....lets say 4 instead. Then at the half point of the game you have 4 out of 30 (maybe 40 when it is done) available talents. To me, it feels low... I'm not arguing to get 10 out of 40 at half point in the game but if you would get 10 out of 40, it would mean 5 toward 6 at half point in the game. I'm arguing that if we had 2-3 more down the road, it would feel better as for character personalization.
No Mnemonic isn't the only one but at first look, I agree that it may feels like it. I've played also with a Cleric using that talent healing himself standing in blood, very nice. A Zombie Witch is cool too. There are always some talents here and there making your character more valuable for choosing such a talent.