It think Italy being at war should be delayed at least until their first turn, or they are attacked.
Something can be considered with Turqy regarding the Goeben incident; not getting the 2 BBs Britain had built for it really pissed off the Turqs, but the gift of 2 modern cruisers from Germany swung them into joining the war.
So start off with: no Turqish navy; but 2 German cruisers in the med. These can choose to sail to Constantinople, then on T1 can be converted to Turqish units. This can be integrated into my suggestion that Turqy can produce no mechanical units, just convert those delivered to their capital.
It also prevents these ships being sunk by the Russia-France-Britain naval triple attack that I’m sure will finish them before T1 in most games.
Of course the German player might choose to use the ships instead to attack the French navy and try stopping it shipping north African units to France…