You can't polish a turd.
This game will never be the definite version and like the previous HD ports will only serve to propagate vices it has against the originals, that in reality can't be resolved.
I think DF and 'Tubers have spent more time looking at the assets in the game than the entire team did for this slapped together project.
To be honest, Rockstar made a casting mistake, but it is a casting mistake due to wanting to spend as little as possible. So in a way, the developer they picked is both inept but also exploited. When you're a small studio you should never land something like this but I understand they couldn't say no. And because they're not industry leading by any standards they also lack talent to turn it around (which would require both talent and being insomniacs).
This is the studio they picked:
Who already knew GTA PS2 body of work and had already borked them all. People will remember them best by the X360 San Andreas port that sucked.
It was clear from the get go that this was a massive undertaking for them, and one that couldn't be polished enough for it to be good.
The result is actually better than their resume would make you assume seeing they managed to release their turd game in 8 platforms at once, I don't wish that on my worst enemy. So they did what they could, dumped assets and threw them into ue4, these being huge games means everything was automated as much as possible, and as little time as possible was spent with stuff like art direction and such.