They won't do a graphical overhaul if it is going to gate other players who play on other platforms. It's not all about the PC players, you have console players to consider. I am sure when a PS5 edition comes out they might consider doing a graphical overhaul, but they aren't going to abandon people who play on PS4/PS4 Pro which DO make up a significant portion of the player base.

This game isn't just for the PC elitists.