The problem with feeding that I have experienced is not welfare BG, but welfare LMB. They hang out in wait to pick off BG at the feeders. Its an easy meal, and partially as a result, they refuse any lures in the pond. Wondering if you have seen anything similar?
Have you ever tried a Bagley Bluegill crankbait?
It is one of my favorite baits for catching very big LMB's that are picking off male BG's as they are defending their spawning beds. It should work quite well next to your feeder.
(Keys to the my bagely BG crankbait pattern are, occupied BG spawining beds out infront of a rip rap bank, some wind blowning into into the bank, and there needs to be some deeper water nearby.)