I was born in '69 and have no recollection of ever seeing anything "Munsters" related in my lifetime.
I like horror themes in general, but Munsters has zero appeal whatsoever. I think it might work as a true old fogie SLE do the chicken dance to get one thing like Batman 66 I guess. But I'm pretty much the core demographic for pinball machines and Munsters means zip to me. Sounds lame as hell too.