I will say, i kind of feel like it is overhyped because of a couple main reasons.
GTA games were so groundbreaking because of their pushing of the mature rating of video games. They had sex, drugs, violence (against police, which was pretty unheard of), and actual nudity. All of this attached to a fun game. However I feel as tho 6 is going to suffer from what a lot of games do these days, and thats american censorship. If you look at a game like Conan Exiles, it had nudity in it, but in the US it was basically half censored. A lot of games are just straight up afraid to put nudity in their games. I was very surprised by baulders gate 3 having as much as it did and being as succesful as it was. So the things that made GTA stand out as unique, isnt going to be as ground breaking this many iterations in.
In addition, GTA 5 had a very long and succesful run. GTA online was fun, at first, but then it suffered really bad from microtransactions, cheating, and creating such an awful grind it felt like a real job. Will they learn from this in 6 when online mode inevitably happens? Time will tell.
Now im not saying it wont be a good/fun game. I think it will be, but I do think it will be overhyped. It is 3rd person so in my personal opinion it will at least be better then cyberpunk. (I tried to like that game many times, just cant do it stuck in 1st person for the entirety of a game that isnt a FPS.)