Hi Hades,
I'll let others comment on your feature request for the scheduler but are you aware of focusing using offsets? In case not... you can "lock" your OIII filter to Lum so that whenever you want to focus on OIII, Focus will run on Lum and when complete switch filters automatically to OIII and apply the appropriate offset for moving between Lum and OIII.
In order to use this, you need to setup the offsets between the filters involved. So lets say you want to do this for narrowband. So run autofocus on Lum and your narrowband filters and get the relative offsets for the focus points for these filters. Lets say, for example, OIII focuses 58 ticks inwards from Lum's focus point. Configure the Filter Settings popup (available from Capture and Focus) as follows:
Now when you focus on OIII, Focus will:
1. Swap filters fron OIII to Lum.
2. Run Autofocus. Say the focus point is 2,500.
3. Swap filters back to OIII.
4. Apply the Lum to OIII offset (-58 -0) = -58 ticks. So focuser will move in by 58 ticks to 2,442
So there is setup work to be done to get the filter offsets for your setup. But your focus runs will be on Lum which is your fastest filter.
This may not be exactly what your want but it might be helpful.