I started with Formula Rookie and am only just about to start the final round of the UK Championship.
I really struggled with Snetterton 200. After the back straight where you have the sharp left quickly followed by a 90° right with the huge kerb, I was a disaster and almost afraid to turn in. Thank God that round is behind me.
That sequence of corners is the perfect glaring example of one of the major issues with AI pace. Ever since PC1, they have been unrealistically fast, across all cars, all categories, in that corner. Conversely, the AI in the same race and same car will be painfully slow through T1.
Snetterton 200 is the most obvious place to see this unrealistic behaviour, but once you know what to look for, you can find examples similar to it at nearly every single track.
Donnington National, they're fast through Redfish, slow through Crainer Curves, and slow through the old hairpin...so slow that in a Ginetta Jr, I can close 10-20 car lengths on the run up the hill to the next corner.
Knockhill, they're unrealistically fast through T3, unrealistically slow through the chicane.
Oulton Island or GP, they're unrealistically fast through T1 and T2, unrealistically flow through the chicanes.
Formation laps are a mess. There's instances where you can see cars sliding sideways down the road as they "weave"'to get tire temp. They crash into each other on formation laps.
Standing starts, every AI leaves the line at the exact same time, exact same launch speed. They are turtle slow off the line, all the way to T1.
The corners where they are unrealistically fast, if you are on their racing line, they'll hit you and you'll spin. The corners where they're slow, they'll often drop speed, either by braking
or lifting, at very unexpected places, where if you are following close enough, reacting causes a spin, since you're already on the grip limit. If you don't avoid them, you'll usually spin from the contact, they'll carry on as nothing happened.
I want to like the AI, it has positives to it. But right now I find it too unrealistic to invest time in. I'm not saying they're too fast, too slow, any of that...simply saying they don't race a car in a reasonably realistic manor.