This isn't a feature that is simulated by the X-Plane X1000, which handles all of the navigation for our G1000. At this time, LR does not provide any mechanism whatsoever for us to modify their navigational behavior in the X1000.
I would not recommend changing that setting, as it can cause significant issues with the autopilot response tuning. If it isn't causing you other issues, you can keep it, but just something to be aware of.
Those settings appear correct. I'd recommend making sure you are on the latest RXP GNS version. If it continues, can you send a video of what you are seeing?
Sensitivity of your hardware trim wheel isn't something we have control over. I'd recommend checking your calibration and seeing if X-Plane provides any options, but I'm not familiar with that in particular.
In g500.cfg for the aircraft where you installed the G500, change the "v_config_*" values to the KIAS speeds for that aircraft. The V-markers and airspeed ranges will adjust as appropriate based on the entries there.
In order to debug what is going on, we will need you to send us a copy of the X-Plane log.txt file. You can find a guide to get this file here:
How to find the X-Plane log.txt file?
Can you screenshot and upload images of the full RXP configuration page for the GNS430 in-sim, in the SR22? (You will probably need to take multiple as it scrolls a ways down)
The GTN650 offset is a bug on our side we'll get fixed in the next update, expecting sometime in August. From the screenshot, I can't immediately see what other issue there may be.
HDR panel lighting is expected to use some additional performance, but it will vary based on settings and graphics cards. I’d recommend trying other graphics settings to see if you can reduce the fps loss as that is much more significant of a drop than we are expecting.
We've seen that report once before on the flaps, it must be something odd going on in X-Plane, but it is odd that only few can replicate it. I've got it logged to look into further and discuss with LR.