Cool-down (the opposite of Pre-heating) could help save £££
The excellent pre-heating function means that zones are up to temperature by the scheduled time. This could work in reverse at the end of a scheduled heated period. Users could set a cool-down parameter of (say) 30 or 60 minutes such that zone temperatures initiate their fall to the set-back temperature a little ahead of time. This would save a little energy/£££.