I am a governor at a secondary school that reluctantly chose to become a (stand alone) academy due to seeing the way the wind was blowing and deciding to do it while there was still fundinmg available to assist with the legal costs etc.
Academies don't HAVE to become less inclusive - that's down to the school itself to decide. The extra responsibility of managing the budgets/paying for services previously supplied by the LEA etc may be a problem, particularly in a smaller school, but if you're being partnered with another academy some of that weight may get taken up by them. I really fear for the small primary schools in particular in this regard, and worry they will get swallowed up by large groups and then "rationalised".
We have found that the LEA has ended up good value for the services we now have to do for ourselves (payroll, internet access etc), so have ended up using them for certain things - the difference being that we're paying for these things directly rather than through the top slicing.
It really depends on what the relationship between your school and the school you're teaming up is like. However, I have a nasty suspicion that schools are going to get forced into these sorts of relationships, so it may be the lesser of two evils to do it while you have some element of choice about who you partner with.