After doing some testing with the XRT, I'm of the opinion that something is still not quite right with the way stalls and clutching are handled. Trying to do a start on an uphill is damn near impossible without either stalling the car or spinning the tires. There's almost no way to cleanly take off without slipping the clutch VERY slowly (and even then, it's extremely difficult). The same thing with trying to take off in 2nd gear on flat ground. The clutch grabs very quickly (at the very beginning of pedal movement) and the revs drop to zero. Pulling away from a dead stop in a normal road car, in first or second gear, is usually quite easy in real life. There's no need to rev it over 3K, and you don't have to be unusually slow in letting out the clutch either. LFS doesn't seem to model this correctly, IMO.
Additionally, stalling doesn't seem to act quite right either. Several times while trying to start off on an uphill the car would drop to 0rpm (or very nearly so, as indicated on the tach), but cluching would allow the engine to idle back up to normal. It's as though the car has a huge flywheel that stops the engine from stalling completely, while simultaneously having a flywheel that is so small it can't get enough momentum to move the car without really spinning quickly. Something is not quite right.
I've also noticed that calibration lock disappeared from the setup menu (this is X31. I dunno about X30 since I never checked). If you previously had your calibration locked and you just installed the patch over your old setup, I don't see any way to un-lock those settings.