I expect the story, writing, and satire to be the same as always for GTA.
Which means it will have some funny satire, and equally unfunny satire because GTA exists in the headspace of a teenager who thinks everything equally sucks And everyone but them is pretentious, insincere, and wrong.
I think trying to use metacritic or sales to prove the writing in GTA is of any particular quality is misguided. Games writing is generally mediocre including in some of the biggest selling games. Poor writing and storytelling hasn't had much of an effect on the sales of AAA games in the last 15 years. People seem to buy games for the overall experience, not just the story. Especially if it's a multiplayer game.
And GTA V has sold a shitload of copies because of GTA V Online. That's basically the real game for a ton of people.