Hmmm, the discussion reminds me a bit of the discussions taking place among Greeks during WW2, when pretty much everyone was certain that Greece's contributions and sacrifices would inevitably mean that her legitimate demands would be accepted post-war, and the only thing was to define these demands. In the end, due to a combination of early Cold War politics (Soviet backing of Bulgaria and Albania) and Greece's own weakness (early stages of the civil war, complete dependence on UK and US), nothing was gained apart from the Dodecanese. TTL will be better, especially if Greece has a seat at the table as an independent power as early as 1943, but not necessarily by much.
The basic strategic calculations still apply TTL, especially concerning the negative role the Soviets will play:
* re Turkey, unless the Powers reduce Turkey to a rump state and decide on a kind of containment policy to permanently keep the country down, Turkey, due to her size, location, and long-term prospects will remain a valuable prize for any of the two sides of the Cold War conflict. But after the experiences with Versailles and Germany, I doubt anyone thinks this is a viable option. Both the West and the Soviets may therefore play the long game and not want to antagonize the Turks too much by stripping away territories which are clearly Turkish (regardless of what they were a generation earlier). Stalin especially is very likely to forfeit some of his more extreme claims in order to appear more friendly to the Turks, and for the same reason (and as it dovetails with Soviet interests) he is likely to fight tooth and nail against any gains by Greece in western Turkey.
* re concessions in Macedonia, it depends on each country: IIRC, Greece and the exiled Yugoslav government had all but agreed on Greece's demands in the Doiran area IOTL, so if ITTL the royal Yugoslav government maintains power after the war, these are likely to happen
* re Bulgaria, they will flip sooner or later, and the Soviets will back them, come what may. The UK/US may also not want to alienate them, especially if Bulgaria's post-war loyalties are still 'in play' ITTL and not firmly in the Soviet camp. If OTL is any guide their behavior in the occupied territories will earn them hostility, and the WAllies having fought and bled against them unlike OTL will play a significant role, but I doubt the Greeks will get all they want, especially in the horse-trading that will follow.
And because similar discussions will be taking place ITTL among the Greeks, with possibly even more grandiose claims put forward, there is very much the possibility that in TTL the Greeks will get their own 'mutilated victory' after WW2, as the Italians did after WW1.