1) when you use moveToXY all safety checks are off and there is no way around this. If you just want to use lon/lat to roughly describe the route of the vehicle you can define a trip like this:
<trip fromLonLat="lon1,lat1" viaLonLat="lon2,lat2 lon3,lat3 ..." toLonLat="lonK,latk"/>
duarouter can transform this into a vehicle route that can be loaded into the simulation.
Alternatively, you could try the script tools/route/tracemapper.py
2) No. When we need to write routes in our scripts, we write the xml directly using print() or fileObject.write().
For writing a .sumocfg I would use
subprocess.call(['sumo', '--save-configuration', 'test.sumocfg', --option1', 'value1, ...])
regards,
Jakob
