Trim force is already modeled. That's why there is a setting for it in the game. Some sims model the trimmed stick position but don't model the trim force. AH models it so you can feel the stick resistance ease as you trim the forces off the stick, just like a real aircraft. If you can't feel that then it's likely that you are using a Logitech G940 with their last firmware update. The update not only porked the trim forces in AH they seem to have made it harder to feel the subtle beginning of the stall buffet. This is because Logitech tightened the feel of the stick near the center position as a pseudo fix for the reversal bug. The reversal bug is a design flaw and it can only be eliminated by putting the X and Y axis on a separate circuit board. If you have a G940 with the original firmware and the X and Y axis connected to a separate circuit board then you have an awesome stick that will showcase the AH FFB, minus the pre-stall vibration. There is nothing HTC can do to make up for the design flaws in the G940. Everything you're asking for is already modeled, except the bit you convinced them to remove.