I have a G29. I tried the simulations of AC, ACC, Rfactor2, RaceRoom, F1 with this steering wheel. In general, I was getting a flat feeling in all of them. Assetto Corsa's feedbacks are good. I was using the Lut I created with the Wheelchecker application before. It was good. But we are always looking for a slightly better driving experience. I applied the Lut settings you suggested (50% gain) and my experience was a separate pleasure. At the moment, there is a feeling closer to real car driving and the weight of the steering wheel is in consistency. The bends and curbs are more enjoyable. Thank you for sharing your beautiful work with us race lovers.
The angle should match, normally.. Do you have 900° both in the logitech software and in ACC? Then it should match... Depending on your seating position and the cockpit settings, you might need to set ACC to 870° or so to make it feel perfectly natural. If you need further help, post your settings (with Screenshots if possible) in the "discussion" of this download.