If the Cs had a steady vet bench PG in Rozier's spot, the bench would have been a lot more of an asset. If a team has Hayward and Brown coming off the pine, a max guy and a top three pick, they need to eat, and the PG that is on the court with them needs to understand that.
I'm a big Rozier fan, and loved his run last season, but he's been a problem this season. Besides being very unsettled at the offensive end, he consistently lapses on defense in key moments. As mentioned above, he's been better the last dozen games or so, but if he can't be consistent, he should be moved for a steadier hand. It will be difficult, because you can't match his salary with most available veterans.
If he is moved, even for someone at another position, they could move Brown back to starting SG, and let Smart anchor the bench as their PG. I don't think Wanamaker is a long term answer there, but in glimpses this season we've seen the second unit thrive with a more traditional PG than Rozier.
Another option is to use Hayward exclusively at point forward with the second unit. He's a great drive and dish creator, although he would be passing to sub-optimal threeball shooters in Rozier and Brown. I'm guessing Brad will continue to work with Rozier to shoehorn him into the role the team needs from him.