I have a feeling, that further changes will be implement to the game soon, because this balance is ridiculous at some points (especially if we're talking about EK abilites), but I'll try to answer your question.
Nowadays players who used to overuse magic shield, what was making them immortal, have to focus on using Might Rings and Stone Skin Amulets again. New spell utamo vita will only protect for a short time during critical situations like traps etc. If spell will be not enough, you can use Magic Shield Potion as next, which has no cooldown, then spell again. Unfortunately cooldown of spell is too long to spam it one by one. What I am afraid about is that the formula of the new magic shield gives not enough to protect ED in hard moments. I tested how long it lasts on a quite weak monsters. In case of stronger it will protect me for one turn? Maybe 2. :x
New exura max vita in my opinion is completely useless spell. You can't use it as a replacement (due to the long cooldown) and let me present some stats on the example of my character:
- exura vita gives 1100-2100 hp (usually 1500-1700)
- exura max vita gives 1540-2600 (usually 1600-2000)
The difference is nothing. You have to be REALLY lucky, to heal yourself enough to survive in a trap. You can easily set the hotkey on Shift+something and the only way to have a slightly better healing is to use of exura vita > exura max vita alternately.
Well, this is my first opinion after one day, we will see... maybe with some time I'll notice more advantages/disadvantages and edit the answer.