I completed it today again and I wouldn't say it's horrible, I like the mix between the regular third person camera and the SH style camera and the exploration was fun.
I feel like player direction could be improved with text not only on the pause screen but maybe also making the protagonist stop and think to himself when he hits a trigger, or maybe how Yakuza does it if the player stands still for 10-ish seconds to display the text, or you can go full SH and circle the map.
It had slight freezes on my PC which is why I would look into either bringing back the Unity default launcher or making an options menu that can change the resolution and graphics settings, they aren't too hard to customize!
I feel like what's there is a pretty good base and doesn't need to be recreated completely from scratch, just needs stuff added onto it. Nevertheless, I wish you luck with whichever method you choose. Pozdrav!