I don't understand your post, edless, sorry.
Are you saying that your local secondary was in special measures, then closed and then opened an academy, and then judged to be satisfactory or something else?
prh, yes, a comparison between for example Hackney Downs and Mossbourne will show a startling improvement in results. This tends to be attributed to the shift to academy status, rather than the vastly different cohort, greatly improved resources, lots of additional staff and a management team and government who believe in it which would all seem to be obvious factors in an improvement in a school.
Academies do, overall, have higher exclusion rates. The problem is that there are strong motivating factors for schools to 'manage out' certain parts of the community which affect all schools, increasingly so with the current bordering on pathological focus on performance data. Academies are more vulnerable to this, I would suggest, because their governing body doesn't have a variety of people from the local community on and hence don't have a corresponding loyalty to the community and real awareness of the undesirable social consequences of dividing communities.
I agree about the vulnerability of SEN pupils - the paragraph above applies to this. There was a terribly sad piece on Newsnight last Monday, which showed young people were being managed our of secondary academies into 'vocational education' at 14 years or so - no opportunities to take GCSEs. This is one very undesirable consequence of de-regulating educational provision. The article also produced some very convincing statistics about the difference in GCSE entries between community schools and academies - the latter entering fewer children so that they don't show on their stats.
I agree that the amount of money spent is only one factor in addition to good teaching and leadership that makes a school good, but it is an important one. I recently did some work in Tower Hamlets primaries and the difference in the number of staff compared to my children's school in Haringey is striking. An extra teacher or TA in each class (which would be possible if Haringey schools received inner London funding as they're compared to inner London schools) would really, really, really make a difference. 50% of the children at my kid's schools live in poverty - this disadvantage needs to be adjusted for at school.
I'm also very, very concerned about the fundamentally undemocratic issue of forced academies, particularly at primary level. In his parliamentary address last week, David Lammy MP pointed out that there are 26 schools in Mr Gove's own leafy Surrey constituency (much less FSM, ESL etc) which perform worse than the schools in Haringey that he wishes to force to convert. Haringey comes 35th out of 141 LAs nationally, Surrey Heath 57th - given that, it is hard to see how Gove's actions in this borough aren't politically motivated.