It's hard to argue the results. Rudolph is a Bostad disciple and the OL has done pretty well. Bostad did just fine with the ILB's too. But, if he wants to coach OL again and Rudolph is staying on board, well, it would be hard to blame him for leaving.
I'd like to see some shuffling of the staff, to be honest. Let Rudolph coach TE's and be the "OC" and let Bostad coach the OL. Move Turner from TE to maybe special teams, which have not performed well under the current guy.