Agreed; I'd rather have a mediocre but stable vet like Darren Collison or DJ Augustin than Rozier.
Rozier's numbers as a starter this year are similar to Collison's. They're actually a little better than Collison's, but similar.
I don't have the numbers but I can only imagine the Collison is more consistent, and less frequently torpedoes his team by taking a series of dumb, hasty shots.
Also Collison is shooting 49.5% on two pointers this year, which is also his career average.
Terry: 43.1% on twos, 40.6% career average.
Terry's shooting stats are way better in the 11 games that he's started.
How much of that is due to him being much better as a starter, and how much is due to the fact that he only starts if Kyrie is resting, which tends to happen against lesser opponents?
My feeling is that if Terry were the starter full time, then opponents would have more time to gameplan for him and his overall numbers would end up somewhere between his current starter / bench split.
Finally, at the risk of really taking this too far since I suspect you're not really trying to stan for Terry Rozier here or anything, I would point out that I imagine Collison, Augustin or the like will expect fewer years and less money.