Heart of Dis, that is a very solid buff spell worthy of the slot, and I like that the trade off is no joke. Resurrection is pretty "easy" at those levels, so effectively losing that is no small matter.
On the flip side, Heroes' Feast received a decent nerf, as its now advantage instead of immunity.
Feeblemind lost 30 range but seems untouched otherwise.
Featherfall gets a hang gliding upgrade, that's cool.