The majority of GOT isn't hot naked sexy people or swords: it's conversations in rooms. Most good shows are conversations in rooms, which is why it's so surprising we've lost the ability to produce and write them.

Babylon 5 demonstrated that you can keep absolutely everything else crappy (effects, costumes, heck acting and even cinematography), so long as you're good at conversations in rooms.

I think Halo could successfully get the Andor treatment (intentional departure from the tone and scope of mainline entries) in the right hands, but so could pretty much anything, and such hands are hard to find.