From a use of the formation perspective, IMO, the WB is effective in 2 scenarios.
1. Opponent does not know how to defend it (obvious advantage)
2. Full Time Use (gives you the advantage of having more opportunities to rip off the big one)
From a quick examination, I see that you are using both the WB and the NDBox. I believe this does not give the WB enough opportunities to be successful.
I'll leave any other comments to sitemails.
BTW: Katzphang 88 has won a NC using the Wishbone...I have not. In fact, I have one gameplan that I have modeled after his NC team. I think sjurat also uses the WB at D1A maybe??