Complex sentence: More importantly with Sikander Bakht Sarfraz developed reverse swing, though this was not recognised at the time despite his unusual ability to move the old ball in the air.
Split into simpler sentences: More importantly with Sikander Bakht Sarfraz developed reverse swing. Commentators did not realise this was reverse swing at the time, though they realised that he had an uncanny ability to move the old ball in the air.