The change in the geopolitical optics alone would be an incomprable boon to the Caliphate. There was certainly an agreement that the Ottomans were in the bottom half of the Great Powers during the time around the Napoelonic Wars among the nations of Europe, but they were hardly seen as the "Sick Man of Europe", or even particularly far behind their contemporaries in Eastern Europe, and they were actively and robustly attempting to push through reforms and absorb the lessons/structures of the period and their loses against Russia (Who certainly had bulk). Had they lost some peripheral territories? Sure, but Hungary and Crimea were fringe as far as Europe was concerned and geographically isolated, so its not like it appeared the Imperial core was vulnerable, and Greece was the three biggest powers in the world ganging up on them and occured while they were in the middle of restructuring the core of their military. Its only after Muhammad Ali, an upjumped vassal, seemed to so easily sweep them aside without any substantial forgien backing in the secure heartland of the Empire that the perception shifted decisisvely from "Its probably just a rough patch" to "Maybe the Empire is crumbling..." and thus removing the shield of prestige that dissuaded excessive forgien meddling, hesitation to form a real solid alliance/gurantee, and gave outlying leaders the perception they too could resist centeralization attempts and build their own petty dynasty and resulted in the Empire not having a period of calm and support to recover and reform for a new "right sized" Empire that could easily have stabilized as a respectable 5th or 6th most powerful state in the world (Tanzimat/Mejii) and a good partner/ally to a first-string Great Power (Britain, France, or Prussia depending on butterflies). A solid Ottoman control over Egypt would also encourage counteries with a interest in the region to get it with honey; getting friendly with Constantinople and protecting her in order to be willingly let into the area commerically and strategically rather than squabbling with other powers and trying to pry direct control of Egypt out from under everybody else), which would only further go a long way to having them properly integrated as member of the European alliance system/community rather than an outsider that's open season for New Imperialism.