Pretty rose tinted thinking. German ignored Greece as Greece was seen as too weak to do anything , a stronger Greece will be seen as a threat. Likewise ITTL Italy will be a lot more likely to see Greece as a threat. If Greece is seen as pro British, which is likely, then neutrality is then likely to be ignored. Turkey has lost a lot of its economy and likely a population exchange ( if not official just due to people not wanting to be in the wrong country given likely higher tension, many Turks will leave Constantinople as they were linked to the Turkish state )I do not believe so.
Greece was attacked by Germany in WWII only after the Italians got into trouble there and the British sent forces to Greece. Only at that point did the Germans see a necessity to secure Greece. If Greece can become strong enough to discourage the Italians from attacking it, I can image the Axis wanting to ignore Greece, provided the British do not send forces to Greece. What Turkey will do is another issue, however we have no idea yet, how strong Turkey will be by then and if not another war will erupt in the mean time between Greece and Turkey, it's still 15 years until WWII.