Possible results of a hellenised achaemenid/macedonian empire

let's say that the diadochi take further measures to Hellenize the former achaemenid empire - allowing locals to enter greek colonies (and more importantly, greek education centers), continuing the merging of persian and greek aristocracy (maybe more 'susa weddings'-type things) and promoting greek ideas and culture everywhere they can.

What hybrid cultures might be created? how would this hellenized middle east react to rome when it rises? what would a grecco-persian/grecco-egyptian language sound like? Would a hellenic persia and egypt allow for more contact with the east?
 
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