Of the two, the OE had slightly less external pressure to break apart and weaker internal forces to split. The A-H Empire was composed of more historically independent and distinct minorities who could clamor for independence but it also had external states for those minorities to escape to, i.e. the Italians, the Romanians, etc. In the OE the Greeks are the minority with another state to attach to, the Arabs are too diffuse to build a separate state akin to Hungary within the Empire or go it alone and only Armenians had an external champion and enough gravity to break away yet to where, Russia and a new master? And A-H has similar issues, to gain independence from Vienna is merely to pass into another orbit. So I would say "doomed" is too much trope built on what happened and not what was happening, the war broke open existing fault lines and imposed new fractures but the essential gravity in each was to hold together absent compelling influence. Long term both had serious issues that might melt them down but I would argue the "inevitable" break-up would be in a more distant future where the threat of being gobbled is gone, just like post-Cold War Europe allowed the Czech Slovak divorce, the break up of Yugoslavia and the escape of Soviet states. In the post-Great War era each would, without outside force, hobble forward, to split is just as dangerous as staying aboard is frustrating, but the Devil they knew should be far less frightful than the Deep Blue Sea beyond.
The break-up of A-H served French designs to surround Germany with enemies and the break-up of the OE was pure greed and 18th century thinking, both are stupid moves and merely fed the fire that still burns, while A-H and OE are imperfect and unstable, each had far more utility as stabilizers, a role I think they would keep on fulfilling in a CP-victory for many more decades, at least until Europe was ready to either unite or co-exist with the multitude of small independent states, and the OE might focus the coming oil bonanza into a broader spread of prosperity and integrate the region back with Europe.
The break-up of A-H served French designs to surround Germany with enemies and the break-up of the OE was pure greed and 18th century thinking, both are stupid moves and merely fed the fire that still burns, while A-H and OE are imperfect and unstable, each had far more utility as stabilizers, a role I think they would keep on fulfilling in a CP-victory for many more decades, at least until Europe was ready to either unite or co-exist with the multitude of small independent states, and the OE might focus the coming oil bonanza into a broader spread of prosperity and integrate the region back with Europe.