It is a FACT that India is in possession of Farkhor Air Base in Tajikistan. Please note that the presence or absence of squadron of MIG-29s is only one aspect of the sheer ambition bordering obsession of establishing itself as a regional power & sell itself as a credible & suitable watchdog for American interests in the region.
Billions of dollars worth military acquisitions especially modernising the IAF goes very well with establishing a foothold in the greater region of South Asia /central Asia is very ambitious and hasnt gone unnoticed by other countries in the region & Americans. For China and Pakistan it is a matter of concern for its military leadership and the strategic planners
The base south-east of Tajikistans capital, Dushanbe a stones throw away (in Aviation/ air force terms) from border to Afghanistan. To begin with India operated a small military hospital at Farkhor but also used the base to ship high-altitude warfare supplies to the Northern Alliance, and execute electronic intelligence-gathering operations. The base is operated by the Indian Air Force, Farkhor is India's first and only overseas military base.
This is by no means a defensive or economic based endeavour. Deploying Mig 29 fighter bombers is hardly meant for goodwill gesture to the other nations that are within the reach of its military aircrafts. IAF ran sorties with its helicopters in support of the northern alliance but that was not done solely out of love for their cause but it established its covert operations in Afghanistan as well with the consent of ever so grateful Northern Alliance.
Hence the placement of Indian consulates in Afghanistan being accused of supporting BLA is a story which keeps surfacing up whenever there is an escalation of violence in Balochistan. Concerns about this base were raised my Former President Pervez Musharraf to the Tajik government of the fact that Indian planes would be able reach Pakistan within minutes using the air base.
Implications for Pakistan
Dividing Pakistani resources to look out for yet another side of the border which has been historically less guarded compared to the Eastern side.
Implications for China
Are mainly to challenge its hopes to gain access to oil and gas resources from Central Aisa.
Finally
PAF chiefs recent comments about the ability to counter the IAF doctrine should be taking into account of our Northern air commands bases that will keep that satellite IAF base in check. The F-16s at Sakardu airbase seem to be a prime example for that reason.