If memory serves, Goeidou had a minor injury towards the end of his ozeki run but stuck it out for the wins (fighting spirit), and it was three or four tournaments before he started to look better, then he got injured again and started the on-again, off-again kadoban parade. His ozeki run included 2 wins over Hakuho, which is the * on his 32 win promotion. I don't think people appreciate the significance of that fact at that time. Hakuho lost a total of *nine times* in 2014, and 3 of those losses were to Goeidou, including twice during Goeidou's ozeki-run. Goiedou's consistency as a sekiwake made it pretty clear he could handle the promotion, and his record as ozeki since isn't the best but isn't the worst.
I like to rag on him a bit because he's my wife's favorite rikishi, and I bought his tegata. And, frankly, he could be very good, if the good Goeidou could consistently show up. But hey, that's every rikishi with a history of injuries.
tldr; he's not as good as first-half Kaio, but he's clearly better than second-half Kaio. Plus, he can beat Hakuho.