The new bike physics feel great, i've not encoutered any low speed steering problems that others have mentioned, in my experience it feels better now. using mouse steering btw
Pretty sure it's safe. The reason you might be getting a detection is because it "hacks" into another application (LFS) and such is classified as hack.tool by antiviruses, but as far as i know it's safe.
As far as i'm aware LFS is the only that has realtime setup changes in the garage screen, like how you can play with the suspension, add weight, driver and see in realtime how each setting affects the car
Currently you can only change downforce by increments of 1°, what I suggest is being able to do so in increments of 0.1° thus there will be more flexibility for setup configuration