Working in education, I say well done to you OP for finding out. Too many parents don't. I'm shocked at how little parents understand or contribute to consultation.
I'm equally frustrated when things go wrong and SM parents comments include ' the LA aren't doing anything' or 'report to the LA'. For some things, yes but not for most.
Academies opt out of LA control, giving them much less accountability through the councils elected members.
Pay scales are high for executive HT's, who in my experience are self appointed. Certainly their pay, against an LA officer is massively increased. A CEO overseeing 8 primary schools in my locality, earns nearly £100,000 whereas the head of school improvement, accountable for 350 primary and secondary schools earns up to £70,000.
Academies don't have to employ qualified teachers ( though some do). They often have a Head of School ( a senior teacher ) who is paid less than a Headteacher to manage the school on a daily basis.
Discipline can be 'unusual', exclusions high ( tho gov are cracking down on off rolling before exams to keep outcomes high).
Trusts running the schools can be quite distant and not in tune with local need.
Small trusts are, ever increasingly in danger of being 'taken over' by larger multi academy trusts. They won't have a choice about this.
Trusts are not interested and will not academise small, financially stretched schools. Doesn't fit the business model. ( tho the LA will continue to try and support small schools in rural areas)
There are some moral trusts out there.
Schools in difficulty are forced to academise under an inadequate judgement. Trusts can access massive amounts of money from the DfE to turn these schools around. LA's could equally turn these schools around but can't access the hundreds of thousand pounds to do so.
Locally the number of schools choosing to become an academy has slowed. We have no more choosing once three awaiting have gone through.