It could have been a better experience if both IPL and PSL allowed each other countries players but to be realistic, both countries do not need other country's players or support to make them successful. IPL is a successful league without any Pakistani players and similarly, PSL is a great league without the Indian players.
Pakistan and India both have produced great players both in the past and right now like Shaheen, kohli, Rizwan, Rohit and more. IPL is doing fine without Pakistan players but it will be more entertaining to see Pakistani players playing IPL. BCCI dominance in cricket can be seen from the fact that they never allowed there players to play any league. As long as politicians of both countries don't have a consent, we will continue to miss action cricket of both countries against each other.