I tried it this evening (no one else in the arena). A few comments, for what they're worth:
The way you have it set up currently there is but a single possibility of combat, i.e. a single Knight TF (BB and one CA) is in range of any Bishop TF. For testing purposes it might have been better to have significant overlap of allies/axis paths. (Then again maybe what you set up was changed by players?)
I could not sink anything, even using the 16"ers. This is in contrast with my prior testing where a single volley from the 16"ers would immediately sink a CA or CV and one or two sink a BB. This evening the first shot seemed to kill
nearly all the guns, even on the BB, but no matter how many times I hit the ship (CA or BB) it would not go down. (Yes it was an enemy ship, got gun kill messages.)
With a lot of ships in a TF I ran into the problem of my own ships constantly getting in the way of my shot. I'm not saying there is a solution, I'm just saying it was super annoying.