20 to 30 Seconds! No wonder you want it faster!
I'm not sure why it's so slow, choosing and connecting to a camera normally only takes a few seconds.
It might be worth downloading a copy of Nebulosity and trying it in that, I'd expect it to be much faster. If so then the problem is elsewhere and eliminating the ASCOM driver may not help.
Preview mode is available in the driver but will need implementing by TheSky/X2. Or there's a setup dialog that's available when connected to a camera that will control it but again this needs to be made available from TheSky.
I can't try any of this because I don't have the camera add on for TheSky.
Chris