Pros for uni:
-Back up degree if flying goes tits up
-Personal development
-BA's Future Pilot Program requires a degree so you'd be able to apply
-Flying scholarships are quite easy for uni students
-By the time you finish the economy will be, or should be, a lot better so more jobs for pilots. Maybe.
Cons:
-Debt
I'm too tired to think of any more cons.
If you are definitely 100% going to uni, do it before you start flight training. It might sound obviously but I know somebody who got their fATPL a few months ago and is starting uni this September to study business. Crazy!
Personally, I was crap in school and was too eager to start flying that Uni went out the window.