Corruption, no way to explore > understand it ?
Thinking construct, no way to go beyond that ?
Redbeard well, You know (talking with Probus) both origin (land) & use, as Keeper, finding what's missing = alright if no better (you have access to nearly all type of informations > knowledge, so ?).
Redbeard killing himself, ahem. Given how proud he is ?
Keeping him in statis as to become an advisor would have been the logical/pragmatist course, my character is a mage, with the required spell but let him (and others before) kill themselves, while (quite a grey area as to yet) charming or otherwise (quite easy to manage something like that, magic of course, potion or other treatment then.
Given the textplot = dead track, opened, mentioned in the ending without any options to be changed = ..
Only recourse being these issue seen over the next game, still, does not make much sens as it is.