It is slightly concerning the amount of people wishing to be told what they should do. The only person that can decide which is the best course of action for them is themselves! No one here will tell you that you should leave uni or stay at uni or anything else. Only YOU can make that decision.
However, out of the thousands of applications for pilot received at the AFCOs, only a few will actually get there. Are those odds worth dumping your degree for? If you are doing an engineering degree, have you considered Engineering Officer? Have you trawled through the information on the previous, now closed thread? Have you spoken to anyone at an AFCO to determine whether you are eligible to make an application to the RAF in the first place? That may make your decision for you!