Converter academies don't have more money or resources. The original ones set up under the last government did - they were brand new schools - but those which convert now don't.
Leaving the broader political picture aside for the moment, in this instance the school was given a notice to improve and did improve by developing the partnership working they were already going with a local outstanding school. The local authority considered that the school had made excellent improvements when it inspected in December.
It seems to have been at this point that the DfE visited and told the governors that they would be sacked unless they agreed to the school being taken over by the Harris Federation. I've no idea why the governors agreed to this, and didn't undertake the broader consultation that the Academy Act requires, or get legal advice re autocratic choice of sponsor or lots of other things, really.
So to answer your question, the problem is both. There has been no reasonable explanation offered as to why the excellent working with a local school (which Roke feeds into and is an academy btw) isn't being allowed to continue or even be evaluated by Ofsted.
The primary reason seems to be that Tory peer and donor and close friend of David Cameron Lord Harris fancies expanding this portfolio of primary schools (the Harris Federation intends to go from 19 to 30 schools this year) and Roke seemed like easy pickings in an area where Harris also have secondary schools and is obviously a school that won't need much or any intervention from a sponsor to continue to improve.
So yes, I do find it all a bit fishy really, as to why public assets are being handed over left, right and centre to anyone well connected enough who wants them, with absolutely no explanation as to how this will benefit the children in the school or the community which the school serves.