Was he a great commander? Maybe in his time, but in the ever changing world of security he was an absolute failure. If he'd have done the same things he did a Pacom 20 years ago he'd have been reduced to Seaman Recruit and booted from the military. Being someone that had to assist in cleanups on a near weekly basis for his command's messes I am intimately familiar with his lack of security.
To be honest, I wouldn't be surprised if the link'd WaPo article was absolutely true about how worthless he was. I, for one, am happy he is resigning. Good riddance to bad rubbish.