I believe that all atmospheric autopilots today should be able to maintain an assigned altitude, execute FLCH, maintain a specified rate of climb and speed. Many can Autoland. They should also be able to follow waypoints as well. These are basic to any commercial airliner, and are now entering general aviation as well. Any new ship would be remiss without these capabilities.
All these things you mention are available in flight simulators dedicated to atmospheric flying, such as FSX.
Excuse me, but isn't Orbiter a space simulator? You want the XR2 Mk2 to have a working FMC with VNAV, LNAV, level change, V/S hold, and altitude hold modes?
For what? So you can fly over a texture devoid landmass with no weather or other traffic?
The XR2 belongs in space, not crusing in sub sonic flight at 36,000 feet.
Why don't we let the XR2 do what it's designed to do and not ask for features that 1. Aren't necessary in a space simulator where over 80% of the time you're in...space. 2. Adds even more development time on the XR2 which, I'm sorry to say, doesn't need any more time added to it's release.
Sorry but it bugs me when people want features that don't belong in a space simulator. Level change? You really need that to get the XR2 from 3,000 ft to 300,000 ft?