I think putting timings in like the ones you suggested would be in a very grey area as far as botting is concerned. I don't want to sound like an alarmist troll but Keyclone saves us all a ton of money in true hardware costs and I could see a feature like that being easily abused.

It is something you can do with macros in wow already though.

/castsequence reset=30 Frost Nova,,
/castsequence reset=30 ,Frost Nova,
/castsequence reset=30 ,,Frost Nova