Balkanization implies a civil war or internal conflict so its never nice, you have to remember its not going to be the federal goverment deciding to disolved the union like in the USSR, its probably going to be a collapsing fed trying to hold on to power aka so its going to be like a battle royal.

and thats only counting states, there are large white supremacists groups or ultra religious groups that are going to use the chaos to declare their own states, organized crime will probably too take over their territory too, Its going to be a bloody civil war if it happens honestly

kinda like the russian civil war but with more guns and also nukes altho those will only be a problem if the feds decide to use them since modern nukes only work if you have the nuclear codes