Roman is over in the sense that fans see him as a star and he typically gets the loudest reaction on every show. He's not over in the sense that he's getting the reaction the #1 babyface is supposed to get, and it's weird that WWE wears it with a badge of honor that everyone projects everything they hate about company booking on to the guy that they see as the future. They overlearned the Cena lesson to such an extreme that they now think if babyfaces are getting loudly booed, then they're doing something right. They also overlearned the Austin lesson to such an extreme that they think the company will go down in flames if they turn their top babyface heel.
At least with Cena, you could point to many other things to show that it was working. It's unfortunate because when you look at the roster, Reigns is far and away the best choice to build around for the next 5-10 years, and at one time, there was a real chance to get him over the right way that has been squandered. There was no going back after the 2015 Royal Rumble and Wrestlemania this year closed the book for good.
I think it's time to start looking at Drew McIntyre.