I agree with your ottoman analysis except the arab part though that was an annoying problam.
Plus by checking the map arkhengelsk so kindly made for us ottomans already had egypt plus a nice secure chunk of africa.They had a much better army economi infratructure and better leadership with out any of the problams of the OTL.The ottomans should have had a quick conquest of greece, overrun the caucasus (georgia azerbeyjan armenia) and made some headway north.
France fell early with the russians know on there own against 3 strong determined enemies (cant count britian not in a position to help them) with all the internal strife couldnt have held the line so well in the caucasus or anywhere else for that matter.Russia seems to have out performed on the otto and AH fronts but crumbled against every german attack.
My point exactly; my argumets were mostly referring to OTL, hence the 'attack on Egypt'.