(Based upon a single, anecdotical, game as Mamluks)
I don't see Ottomans being weaker with the new patch.
They still ate their minor neighbours, kicked around Venice, etc. The only reason stuff like Karaman still exists is because I allied them (as Mamluks) straight away, and then proceeded to eat and diploannex most of Arabia.
At some point, I noticed Ottomans were figting the Ao's, with ~40k troops and ZERO manpower remaining. Figuring I had a slight edge on drill/professionalism and good generals, alongside 48k troops, I 1on1 DoW'd the Ottos (plusminus a few vassals of mine, but their 16k (total) barely moved or contributed).
Troop composition should have favored me (I was running a very cavalry-heavy army around tech level 7-8), professionalism/drill favored me, they were running 20k mercs and out of manpower, generals were equal, they had a 5% discipline advantage.
They nearly wiped my 48k troops with a 12k regiment of infantry (no terrain advantages).
Despite me getting several hundred ducats of presents from Otto rivals, I had to peace out after running out of manpower and money, and barely managed to sacrifice one 24k stack and my fleet in order to rush down the wargoal, to minimize losses to 19% of low value North-Arabic provinces.
Shortly after the Ottomans Independence'd the Ao's (my key opportunity to expand and cut off the Ottoman east expansion), then DoW'd the Ao's (I still have no fucking idea how they managed to do that despite guarantueeing them)...
For the time being, I'm now trying to eat through Persia in an attempt to block off the Ottomans from India in a second line, whilst having completed my own conquest of Arabia and workign my way down East Africa. I'm now the #1 Greatest Power (Dev just 50 short of Ming), got Muscovy (bordering Ottomans on the Black Sea) as ally, and hope I can somehow deal with the Ottos later on.