Well from what I have read most maps are pretty generic, if that's somewhat true then your economy map will probably be about 170bhp, 60nM plus on torque and claimed up to 20% fuel increase. I've heard of that tune to helps with dodgy start ups, but that was something to do with cold starts and the engine cranking a lot before firing up. This can be a couple of things, battery starter or maybe temp sensors.
The shaking I have only heard about when the car is idling in which case torsion valve timing or dual mass flywheel (if DSG) are usually the culprits. Actually come to think of it the remap was suggested as a cure for the shaking too, as when air con switched on it stops.... I;m not sure your problem is the same though. Sounds like your car starts fine but then shakes a bit before settling if I read you correctly? Or is it shaking on idle?/ When in neutral...