I voted to keep starting Ben. I think you start him at least through the AS Break. If his play continues to hurt the team, then you give more minutes to Thornton as the back-up. Similar to how IT off the bench was routinely getting more minutes than GV.
Per the IT / Ben discussion, not inextricably linked. Quite easy to extricate actually. The question on IT is, does his role as a highly efficient, but high volume scorer fit within the starting line-up that already features two really effective scorers? It's not about building a Big 3. To think that having a Big 3 is the magical formula to success is just silly, and only popular because a few teams as of recent have won with 3 high usage players. Now, if you want to argue that a Big 3 is essential in building a multi-year repeat threat, I would be more likely to buy into that, but then you need to look for a different Big 3 than Cousins/Gay/IT. Two of these three guys are just borderline all-stars
right now.... Cousins is likely to be a perennial all-star in the future (it should start this year), and Gay, if he can get back to form, could also be. IT with the right team may have a couple of all-star seasons in him, but if SAC keeps on playing like we are playing, it won't happen here.
[added via edit to keep this about Ben
] I think the question with Ben is now that you've started him, do you yank him back to the bench because of rookie-standard play only to bench him for someone whose play is only questionably better at the most... I think at least for a few more weeks you ride it out if only so that you don't destroy the young man's confidence. You send the message through less playing time though. Then, you hope that a trade of some sort happens post AS Break that allows you reshuffle one more time.