Don’t misunderstand me, I don’t see any widebody op’s in T3 ever again, even if AA were to return, and as I said I don’t believe you can keep everything in a neat and tidy box when it comes to alliances and operating models.
My main point however was that you can’t really differentiate Terminal allocation on passenger spend either, at least in MAN, the misconception being that LCC pax spend less. Having worked for both a network carrier and LCC it very much depends on destination and it’s your leisure traveller that spends the most. At MAN, leisure is still the dominant demographic. That is partly why MAN has so many based aircraft, many of which are from LCC’s. Imagine trying to get all those away on a morning if they are all nicely ‘sectorised’.