1. That's conversation RP. The difference between this cryogenically freezing stuff and healing RP, even if the subject is unconscious, is that the healed subject also emotes the changes affecting their body, or complications of the wound the healer did not originally see. Then, afterwards, the cleric/shaman/druid is tired, and their subject can do as they see fit with them, whether pamper, kick, or simply walk away and ignore them. Mutual RP, loads of fun, everyone goes home happy and with most of their characters' limbs intact. This? You describe side effects, but those come after the thawing process. The process of freezing someone would be instantaneous (at least, according to popular sci-fi and fantasy. If you could provide an example of this being used in an RP scenario, that would be groovy :) ), so the subject would only nod, struggle, or simply lie unconscious while the mage/mages alakazambed ice around him. Its a neat concept, to be sure, but not much RP takes place during and directly after the magical event.
2. I'm sorry, not seeing how arcane shielding can be used for that. You'd have to make billions of tiny shields or something around the individual cells, and this is LOTC, I don't think we have cellular theory yet :P
3. Okay, did so!
4. While its true lore on fauna and flora isn't really necessary, magic lore is its own thing. All lore on magic that is accepted was necessary before people started using it because it has prominent differences. If there is something that is exactly like necromancy and has no unique qualities, for example, it will get denied. Aengulic evocation also got denied, because it was pretty much evocation, just with a source other than the Void. This magic describes some sort of healing (or anti-injury? anti-damaging?) agent using the Void, which treads on Holy ground.