Shouldn't be captain, but yeah I don't mind him coming back to PSL, Amir after all plays in it.
I don't think any of the trio should have been able to play international cricket again. You could argue PSL too, but when you've got a fixer who already plays international cricket too, how can you deny someone who pretty much committed the same crime, the rung below that too.
I think Pakistan has been very soft on fixing, yet I don't think we've been fair. They essentially all committed the same crime fixing. Yes Butt's slightly worse as captain, but not much worse, and more importantly you can't blame Amir's wrongdoings on Butt, Amir was an adult (and quite frankly spun a very unbelievable story to devoid himself of blame which was poor).
What we should have done with the trio is ban them from international cricket forever, let them play domestic after 5 years ban. Once you've tarnished your country's reputation, that's it your chance of representing your country has gone. And maybe after the trio ban, PCB should have announced anymore fixers would also receive a PSL or even full domestic ban to discourage anymore fixers. Instead as a result of being too soft on fixing, more Pakistani players ended up fixing again e.g. Sharjeel. I didn't think it would be a strong enough deterrent the 5 year ban, but I didn't think it'd be that weak for it to happen again so soon.