My personal opinion, I would probably wait, depending on what you're looking for in your game. PR is great but still needs some work in my opinion before it can replace STP and UB. I prefer PRs ability to call for code 1 backup where as when using ELS with UB you don't have that option. I also enjoy testing evidence and being able to bag the evidence. However where UB and STP are better is when calling for traffic stop backup, they come in neat and organized and park behind you, when I call for traffic stop backup with PR they always come from the front side and have to turn around, usually driving on the wrong side of the road and ramming cars, then when they get behind me they sometimes ram my car and shove me into the suspect. Also when calling for pursuit backup with PR, they all spawn in front of the pursuit bunched together and lots of times they spawn upside down so there will be backup units all over the place flipped upside down. Also compulite is not compatible anymore, which is unfortunate, I like having an in game system to use, I don't want to have to hop out of game to use a third party system. And lastly you can no longer end callouts with some plugins, with UB you can press G and there is an option to end your callout, where-as now you must press the 'end' button which doesn't work with every plugin, lots of times now I have to force another callout just so I can go back 10-8. I am not trying to talk bad about PR because I think it is a great mod and I use it myself, I just think it still needs a lot of work before it can 'replace' UB and STP. So long story short, it comes down to your preference on what is more important to you in your game.