If you truly want a SMB/YP/WE/HSB/RES fishery you could lime the pond and start over due to the BG "infestation". Lime is cheap...as long as you know you won't have any invasive species enter the BOW again [creeks, overflows, ect.] this makes sense to do this now as y our entire fishery is probably at risk anyhow. I know that sounds drastic but if I had a chance to start over I would and keep BG and BH out of my fishery.
I would never advise you to do something I wouldn't personally do. Really the only thing you're losing is some forage and BG, right? All depends on your goals - BG aren't going to ruin your fishery, but will always be a management issue I can attest to that. If you ever want to talk it over you know how to reach me.