A POV of the Bataids / Romans is surely needed in the future, since we haven't seen any accounts of people in Eastern Islam besides major figures in the historical record. It'll probably happen since they're going to be the main focus whenever Hungary, Meridiana, Egypt, or Persia are involved. Even the conflict in the Indian Ocean could be a source of a Bataid POV since there could be incentive in keeping the Somalis in Zeila/Warsheikh loyal to the Abbasids and bring them strictly in the Roman sphere.
I still believe that a ruler similar to Justinian or Suleiman the Magnificent could be extremely likely in this period: a man greater than Al-Mansour driven by immense ambition to reunite the Roman Empire once more and conquer the world under the light of Islam. A pretty scary sight for Christian Europe or even the peoples of Western Islam.
Still, the Romans and the other peoples in Eastern Islam are also major contributors of the Blossoming, no doubt. The Bataids probably hold a more prosperous and urbanized realm than the OTL Ottomans, due to no Mongols and a more Hellenized state spurring city development. Cities like Thessaloniki, Constantinople, Iconium, Antioch, Damascus, Baghdad, and Basra are probably still centers of scientific and cultural development post Plague, perhaps even moreso than Isbili or Sale, combining both existing Greco-Roman knowledge from Antiquity and the ERE, in addition to the massive centers of knowledge that exist in Islam and the polymaths that follow (The House of Wisdom is still intact in this timeline, most excitedly of all).
Even if their scientific and cultural developments aren't as respected, their military is still extremely terrifying, possibly the best army in the world besides Wu China, and they gotta swing those tagmatas somewhere....
EDIT: I think we're forgetting some of the most important people in the timeline.... Iqal, Feyik, and Dr. Mirza. I hope that we can get a section on them and Dr. Mirza's class in the future since glimpses of Modern MiaJ are so fun to read about.
EDIT #2: Looking up on general information about Baghdad, Basra, and Mesopotamia/Iraq in general is that without the Sack of Baghdad, we've seriously managed to spare a lot of the destruction on the irrigation networks and overall urban infrastructure of the region, including the House of Wisdom and the other libraries in Baghdad. This definitely means that Iraq should be a lot more urbanized and less pastoral as said before, similar to North Africa in MiaJ without the Banu Hilal. The addition of the Romans probably doesn't hurt the development of Baghdad too. While Baghdad and Basra are probably not at their zenith due to the shifting of trade towards those facing the Atlas, they're well off compared to their diminished selves in OTL.
I thought that the old Round City of Baghdad was spared as well, but apparently it was destroyed or severely damaged before the POD. Still, a rebuilt and bigger Baghdad is obviously better than one severely sacked and decimated.