I tried the new focusing algorithm several times last night and it works a charm. I typically use a 7-point array and if the focus point was off to the left side by more than 1 click, it extended by a few more points to be sure.
One idea though - if the focus point is off to the right by more than one click, it repeated the entire array, starting at the highest value. With narrowband filters, this takes an age.
My suggestion is, if the focus module has backlash enabled, why not just add the extra points on the right hand side without repeating all the others too? There should be no detriment to the overall result and be much quicker.
One other thought, now that the focus module will work over a wider field, it can be that the HFD calculation can get confused on the fainter intensity. Is there anyway of flagging that on the initial exposure of a run and increasing the exposure time to accommodate? (I recall FM does something similar)