Hi Peter,
Please remember that we need to reload the renderd if you change your style and we also need to purge the pre-rendered tiles on zoom levels <10 if you start rendering there. So mail to this list if you want sth. to be changed.
Maybe it would be possible to create a cron job to check once a day if any style was updated? Of course I still test my styles on my local machine first, but I could imagine that it'll take some weeks untill the style will be relatively stable.
I would feel better if hadn't to bother you twice a week.. ;)
Regards, Thomas