Zia managed it with politics. Did you had balochistan problem in his time, or say a decade after we he was assassinated?
Balochistan was a settled issue, it only was reignited, artificially, when our liberal stupid generals and establishment, allowed all the enemies of Pakistan gather inside Afghanistan and use it as base to launch this terrorist campaign. Another stupidity, which is still ongoing, is not to confront Iran over its involvement in Baluchistan. Zia never shy away in telling these Persian Mullahs their place.
It's an intellectual dishonesty from you if you putting the incompentecy of those who followed Zia into his account.