As Viv state, they did do a trial but the outcome was that they thought the profiles were not stable enough and will not be rolling them out any further.
Not the best outcome.. but as they do not have any automatic systems to allow control over this, I assume they decided not to due to the manual work involved in each change.
They are working on a API system to allow some changes but that has been in the making for over 18 months - even inter-C&W migrations still dont work and that was meant to be fixed December 2009.
Matt