Let's say Austria decided to side with Russia or remain fully neutral in the war and also if Russia took advantage of France and Britain's slow landing on Crimea, weakening the allied forces. The Ottomans have some success but are not able to hold against the Russians and fall in the Balkans. Would the allied forces surrender once Russia defeats the Ottomans at the Caucasus and Balkans? Would the British and French continue the war after disaster at Crimea? What would happen and how would this effect history?
Winning Crimean war will be definitely a tactical victory and
strategic defeat for Russian Empire.
1) The emancipation of serfs would be delayed (OTL happened in 1861), crippling Russian economy
2) The introduction of rifled weapons will be delayed because Gorloff and Hunius will likely be not sent abroad (as the result of their mission, OTL Berdan rifle introduced since 1868, among many other rifled designs), crippling Russian military
3) Expansion to heavily populated and rebellious Carpatian mountains - stretching logistics and dispersing army
Overall, winning Crimean War would harbinger a crippling, devastating defeat for Russian Empire in the following 10-20 years, with large territorial losses and may be partial fragmentation of state. Imagine Russian army with essentially muskets against Gatling guns.