AFAIK you have to wait 30 secs after initially starting the car, because the EDFC winds all the way out and then winds to the preset.
Yes, that is correct.
The only system that I know that does ride height is the Hydraulic Lift System by KW.
Designed to only lift about 40mm to get over speed bumps or steep drives/ramps, but are proudly advertised to be able to be activated on the go for up to 50 km/h.
But it's £2000+ per axle, plus a set of KW coilovers.