Baloch separatism has gone through various phases and spurts. The current movement started when Gen Musharraf was in power around 2003.
https://en.wikipedia.org/wiki/Balochistan_conflict
In all conflicts Baloch have fought PA literally with little international support. Poorly armed and in low numbers. What is important to remember one does not need a million strong army to make it difficult for the enemy while fighting Guerrilla warfare.
The template of Bangladesh may not be apt but there are points which may be used. While Bangladesh was heavily populated, I have not found references of Mukti Bahini being a greater than 50K troops. Even in the Mukti Bahini the number of troops varied during various phases of resistance during 1971.
https://en.wikipedia.org/wiki/M._A._G._Osmani M.A.G. Osmani was the Commander in Chief of Mukti Bahini in 1971.
This means that raising a 20-30K Baloch force will be enough to wage an effective Guerrilla War against PA.
Capture of territory and holding it is a different challenge. Here, a pointer to two recent news I saw on twitter will help understand.
News1> Pak helicopter gunships fire upon and destroy a Baloch village.
News2> Pak Army soldiers burn a Baloch Village saying Allah will give them more.
If an army is able to physically go and destroy a village why did it use air assets at another? Was it unable to go there? Yes, as per me. There are large areas in Balochistan where road infrastructure is very basic. The place is hilly and ambushes are common. PA fears casualties and hence uses air assets against Baloch. A good supply of MANPADs and training to Baloch will help in neutralising the role of PA air assets.
PA is also loath in deploying its best units away from Eastern border. An increase in sophistication and activity of Baloch Guerrillas will force them to redeploy some assets in Balochistan if the Air arm becomes less effective.
A Baloch navy like the Mukti Bahini navy (however small) armed and active like the pirates off Somalia coast will also make work in Gwadar difficult - both for PN and PLAN.
There will be casualties on Baloch side but an increased headache in Balochistan is not something PA wants or welcomes.
It is also my guess that GOI has already spoken to Iran, Afghanistan and Balochis (at least) that this support is only for Pakistani held Balochistan.
An important point to remember is that GOI is making statements on POK and Balochistan together and not separately. The pressure on Pakistan will come on both fronts simultaneously. I also expect Pashtuns from Afghanistan side to open fronts on the Western borders for PA.
These are my opinions only. I am keen to read what SSridhar ji and Rajaram ji have to say on this.