I flew the C182 in the sim to see if I could replicate what you're describing. When I back off on throttle on the C182 the nose drops, and I need to apply up elevator as the airplane slows down. This elevator trim change is expected. If I instead trim out for idle glide, then when I add power, the airplane climbs and I need to apply down elevator to keep it level. If the amount of up/down elevator that you need for trimming like this is more than you're expecting, then it's a function of the c.g. position. If you move the c.g. back (in the airplane editor), then the amount of stick input required will be reduced and maybe more like you're expecting from your own experience/airplane setups.

The part about "wander (fishtail) all over the runway" is not something I can replicate w/ my setup. At the Frasca field w/ the C182 airplane, when I add throttle, the airplane tracks straight (no wandering). Is there a specific case that you can describe? I wonder if something is weird w/ your controller. Press 'e' when your flying to see if the stick input (in the sim) corresponds w/ your stick input (w/ the TacCon controller).

For now the airplane engines can be killed w/ the 'k' key when the stick is in the idle position. Trying to make this work from the Tx is something we can think about doing, but having the PC as the "middleman" to the airplane makes this tricky and frankly we don't have a good approach to doing this, hence the 'k' key. I know what you're talking about ... say, setting the trim to neutral, and then when pushing the trim all the way down the engine kills. We are thinking about it.

Michael