I haven't finished the questline, lazily doing it befor emore unlocks on patch day, and I haven't checked the PTR story yet, and I don't mind spoilers (don't care really),
But Wrathion goes all over searching for ways to lessen the effects of corruption/ the whispers ... all teh major sources of lore are consulted -- the Shen'dralar, the Pandaren Lore KEepers, his own flight's records, Karazhan (which makes Kirin'tor redundant) - but why isn't seeking the void elves for answers to guard against corruption? and I would expect Suramar and Nar'thalas to have more ancient records, unless the Shen'dralar records superceded theirs ( he does spend 2 pages going on about their great knowledge - and that they'd even handled the void with some meausre of success - but most of their records in Dire Maul are destroyed.. to question?
1. Why not go ask living Shen'dralar?
2. Why not ask void elves and the Locus Walker?
3. Why not ask some of the Keepers who surely would have nowledge of this?
4. Where is the Light and why isn't it being used?
He does explain why he can't get knowledge from other flights.
I have possible solutions: for 1 & 2 - it could be that he has n o one to trust for certain amongst the highborne or void elves for reliable answers, not knowing who's been watched by n'zoth and who's been overcome, or they just know with the living ones would have provided answers already if they did, and Wrathion has already exhausted that.. Or maybe the void elves know other void whispers and N'zoth is more a direct hands on, which is much harder or slightly different than the general beyond the veil whispers? As for the Keepers, they may have no knowledge of how mortals can safeguard corruption - although this doesn't seem plausible, I guess the fact M.O.T.H.E.R doesn't know is the answer to the Keepers not being satisfactory avenues.. As for the last.. what is the light? At first it became useless against undead and demons, and now all void solutions don't seem to involve it.. I don't get it ?
Surely good writing would at least show as clearly why some of these other avenues haven't been used.
Also, I notice a lot of humans and void elves now serving N'zoth when I was in the Karazhan catacombs... looks like they fell to the whispers OR it's possible in succumbing to N'zoth, Thalassians gain the void elf appearance but are not part of the ren'dorei group on the alliance trained by Alleria.
Note I haven't finished yet.