I feel the trim speed is quite right in the SR22. The Cirrus will balloon when flaps deploy as well as the reverse when flaps retract. On my set up (your set up may vary) the ballooning is very controllable. I think if anything were to be adjusted is maybe the pitch moment. I prefer the fine trim ability as it is set now. Also in the sim, we trim to the neutral center of the controller and not trim out excessive forces. That actually tends to lead to over trimming. If in level flight and a stable power setting, you trim for level flight, even as much as leaning for cruise will require more trim to counteract the aircraft decending due to a reduced power setting, all the while trimming the aircraft for the center of your controller. This can lead to an excessive nose up trim when further power is reduced for decent and the flaps deployed will exaggerate the nose high pitch trim with ballooning. Your controller will be at neutral, while the aircraft is trimmed pitch high requiring even more pressure on your controller to overcome.
Enough of my soap box. Trim in the sim can be very subjective.