they're aware of what's happening in the story? yeah, i'm sure they are. aware of potential audience reaction to that story? while i'm sure that they feel that there will be repercussions (as was naughty dog), i, again, think that they're possibly underestimating what exactly, thanks to gameplay, you can get away with, character-wise, in a game vs a tv series...
i finished tlou2 because i bought it because i loved tlou. while the gameplay was solid, i really disliked tlou2, &'ve never gone back to it. i, personally, would never've sat through a tv series version of tlou2. all i'm saying is, tlou lightning might not strike twice, & if it doesn't it'll likely be because not everything that works in game stories necessarily works in tv stories, & hbo didn't fully appreciate this...
what i would've done? run 2-3 seasons of joel & ellie's life together immediately post tlou. continue to feature joel, fill in the missing years, let the actress playing ellie age a bit, build up some new characters. & then, maybe then do tlou2...