Reading around and watching a video or two, I get the impression this game is running into the same issue Project CARS games had: trying to simulate so many things at once that CPUs simply can’t handle it.
That won’t be an easy fix, or may not even be fixable at all. Depends on what parts of the simulation they can cut to gain back some performance overhead. Do they simplify the AI physics a little, for example? Maybe scale down LiveTrack a bit or reduce the simulation tick rate to fewer calls per second, who knows.
Maybe things improve with a few patches but from games I’ve played and worked on in the past, I know that CPU-strained games are notoriously tough to draw performance from.