Its likely I dont understand your switch concerns so lets review the subject for both our benefits.
My understanding of the switch function is one of safetyIE an on/off control over ignition whether to prevent an accidental firing of the engine,or the ability to shut it down fast if necessary ,(loose mount,thrown prop,etc...).Keeping this in mind I have never understood servo driven switches since how are you going to shut the engine off in event of a complete radio failure with the engine running?
Therefore I use a manual on off switch in a reachable location.
Regarding starting I know I will be flamed for saying that I use switch on and full choke until the engine fires and stops.Then choke off throttle to idle and start EVERY TIME.
What am I missing?