There is a lot of contradictory stuff there, Ragged!
The academies and free schools are essentially the same thing. The main difference is that the new free schools don't have to have an outside body sponsoring them.
The governing body must include at least two parent governors and the head teacher. It is up to the academy to decide whether or not to have an LA governor, a staff governor and a co-opted governor.
Academies are in control of their own admission arrangements but they are not allowed to introduce selection, although schools that are already selective (i.e. grammar schools) can continue to be selective after converting to academies.
Academies are free to set the pay and conditions of their staff. That means they can pay extra to attract good teachers or, if they wish, pay less than other schools. Of course, if they pay less than other schools they may find it difficult to attract staff. Staff will, of course, have the same legal employment rights as anyone else and academies ignore that at their peril. Having said that, academies may find it easier to sack bad teachers.
Regarding outside/community needs, whilst academies are responsible for their own admissions, they are still answerable to the local admissions forum and, if necessary, the schools adjudicator. They get additional funding for children from disadvantaged backgrounds (the "pupil premium"). They are part of the co-ordinated admissions scheme run by the local authority. And they have to make themselves attractive to local parents or they won't get any pupils!
As far as I am aware academies are under the same duties to employ qualified staff as any other school.
Pandering to pushy parents can happen at LA-controlled schools. I don't know if it is better or worse at academies.
As they aren't allowed to be selective, I can't see academies sucking the bright children out of other school, any more than a popular LA-controlled school does. However, they will have more freedom to expand if they are popular.
The academies have to follow the national curriculum in English, Maths, Science and ICT. Again, I doubt most parents would continue sending their children to a school that was indoctrinating them for commercial or evangelical interests.
I'm not here to defend academies/free schools. I'm sure they won't be perfect - nothing ever is. I am genuinely interested to see if they improve our education system in the way protagonists of this approach believe.