The way I see it is that holding the PSL final in Lahore is not really meant to be a message to the outside world but rather a spectacle for the locals who have been starved of cricket of this magnitude. Of course, if there are no international players then they are really just watching a domestic game.
From a security point of view, there is nothing to be achieved. If it goes well, it does not mean Pakistan is a safe place to travel to. If it goes badly, well.....
From a security point of view, there is nothing to be achieved. If it goes well, it does not mean Pakistan is a safe place to travel to. If it goes badly, well.....