Hi Alkie,
if you are the main applicant, you dont need to have your wife's name in utility bills. But joint account is always recommended regardless who is the main applicant. suggest upload a joint account to your application.
What I did in my application, I created a photo pack showing my my enjoyment moment of my life with my wife for the past 10 years. I then changed it to pdf file and uploaded into my account. I am sure that was one of our reason's for direct grant.
RE PCC, if she came to Australia before June and she obtained the PCC in June, you don't need to renew her PCC. However, once you submit the application, you might be better to renew them every 6 months to be on the safe side. Honestly, if you are submitting your application, you don't need to worry abut the PCC at this stage. You will do after some time.
All the best,