Hi GavinA,
We're also looking at this again, the main issue appears to be masses of job related paperwork to prove above and beyond MCS compliance. If you're MCS certified, it should be just another mass of auditable paperwork trail.
Why are we looking at it?
We see that there is a VERY strong probability that there will be no FiT and no RHI beyond April 2016, as such then they will drive people to fund under the Green Deal, hence requirement for PAS 2030 going forward.
They may even give grants / allowances to the MCS /RHI technologies through the green deal - for example you can get a cash back for a condensing gas boiler but not for an oil boiler or a biomass boiler (ridiculous .. ). It will be simple for them to extend that scheme and cap the expenditure. That will drive more people that way, even if they don't use the Green Deal Finance options, they'll take the cashback.