Well one thing changed: the PR Supreme Court told the police to go to a shall-issue system for PR residents, based on the 2nd Amendment.
Now, that hasn't immediately translated to reciprocity that I know of. HOWEVER, based on that decision, if it was me I'd check to see what the issuance standards are under the new system - hours of training involved mainly - and if my state's permit requirements were similar...well, I honestly think they'd have a hard time convicting if you packed on another permit.