Upon retrospection, I realized I expressed what I meant to say about the Ottomans pretty badly.
I think it has more to do with the fact that they spawn with doomstacks and gunpowder than the fact that they show up in 1280
The Ottoman Sultanate was definitely a well organized power before 1400, under Osman and Orhan, but they didn't have much gunpowder, and definitely didn't have janissaries. They were still creating the blueprint for their future empire, and laying out the foundation of things like the Janissary program and the framework of rule over the native populations that would define their empire.
Perhaps the ideal situation would be having them spawn with adequate forces to lock down Anatolia and begin forming a nucleus there, while building up enough power to take Constantinople. After all, the Sultanate of Rum was a prominent power there since before the Crusades.
I just found it a bit jarring in my Rome-Byzantium playthrough when they showed up right outside Constantinople with musket-wielding Janissaries before 1300.
I hope it doesn't seem like I am coming here commanding you to change you're mod, these are just observations