Could a conflict in the BALKANS BREAK OUT AGAIN?

Very recommendable! Just pray that the Russian war of aggression against the Ukraine does not spread into the Balkans. The Balkans have remained to be a multi ethnic hotbed at least since World War I. Only during the long reign of communist dictator Tito was there some stability and economic well being in the region thanks to Balkanization (divide and rule).

Solve the Kosovo dispute to counter Chinese and Russian influence in Europe

Very recommendable! Not only Putin the Terrible, but also China are trying to establish and expand their sphere of influence in recently liberated eastern Europe! A grave concern!

"China and Russia have meanwhile fallen in line with Serbia. China has invested over $10 billion there over the last 10 years, trained Serbian police forces, and furnished Belgrade with surveillance technology. Russia has waged disinformation campaigns, funded Serbian nationalist groups, and armed the Serbian military. In October, it temporarily deployed its notorious NATO–killing S–400 missile systems there."

Solve the Kosovo dispute to counter Chinese and Russian influence in Europe | American Enterprise Institute - AEI: To roll back hostile influence in Europe, the West needs to bring the Kosovo dispute to a close.