Remove all the penalties from Bolt Escape and dodge roll completely, and just have roots stop Bolt Escape, and have snares give dodge a 50% effectiveness penalty, meaning even if you dodge an attack, while snared you still have 50% chance of being hit by that attack. That way you get rid of those lame game breaking penalties and at the same time you make roots and snares much more useful and viable, since right now they don't really mean anything.
A penalty is such a lazy and uninspired method to balance a problem, all it does is create different imbalances, what are you going to do when everyone dumps their stamina build and either quits the game or respecs to a magicka build? That's what is going to happen because you used the sledgehammer here to destroy all stamina builds, they have no way to survive anymore now, everyone will be a magicka Sorc or magicka NB, to use Ward and Cloak.. and when that happens, are you going to put penalties on those skills too?