Sanderson's adaptation was all about the fan service to an excessive degree and included a lot of unnecessary "fixes" like Hawkwing lecturing Mat about being ungrateful to Rand, because that's stuff that annoyed some fans or maybe even Sanderson himself. I think he'd do a better job of spackling over some of the gaping holes in Season 8, whether or not he had the same notes from Martin that they did. As grating as I find his dialogue, it's a step up from TV dialogue and probably owes more to screenwriting than novels. Even his style of infodumping through dialogue would work well with TV stuff and he'd be inclined to have characters say things that might rationalize or justify certain decisions.

On the other hand, D&D utterly lack the capacity to fix what's wrong with aMoL. Their misunderstandings and errors with regard to the source material are evident even in the early "good" seasons of GoT.