Optional Auto Focus Targets and Options

I have experienced problems achieving autofocus on certain targets, each time there has been a better target nearby that could be used. Please will you consider allowing more control over the autofocus trigger and target. If an optional autofocus target could be specified for each target in the sequence, and/or an optional autofocus target specified for the sequence as a whole that would be great.
It would also be great if there were target options to Slew, Centre, and Autofocus. That would then provide an further option to maintain focus during a session. Many thanks, Stephen.