Having those 2 territories in Palestine and Vancouver will end up in tragedy.
With less Jewish population in the middle East, the Arabs will win with weight of numbers and the other powers may well decide that the Jews are too ambitious in attempting to have 2 countries and allow Jewish...
Neither the Romans or the Persians in their current situation should overstate their welcome in India.
If they don't leave promptly after getting Ibrahim they risk being swamped and destroyed by fresh and huge Indian armies.
For it to be the end of the Empire means that the next dynasty will not have the powers of the Thalassan dynasty, but rather diminished powers with either the Senate or a noble's Council having greater powers.
The problem is that as the colonies grow stronger militarily and financially, and with the natives rise in power within them, any loyalty to far off Constantinople will wane and disappear.
Why pay taxes and be exposed to a monopoly in trading with a far off overlord when we can perfectly...
But not the far east. From India and beyond East Africa it is fair game and the naval traditions and increasing tech generated by conflict of the Europeans will cut off the Romans and Persians middlemen status and advantages in the coming colonial race.
The parallels of this Rhomania and OTL Ottoman Empire are increasing. Both were the greatest powers of their age but were left behind by the northern and western European states searching for a way to the riches of the East without the middlemen.
Yeah, perhaps they could sold only the territory up to the Mississippi to serve as an easy frontier and a trade avenue with the US but they wouldn't have sold all of it.
The Japanese are full of it. Nothing they have will allow them to win a land war on Asia.
Though they can keep Sakhalin after they sink the Russian Pacific Fleet.
That attitude is what will allow the Latins to sort themselves out and bring unification into an European Union 300 years later, to the wails of Constantinople XD