Roseanne was the show, thus it worked. If they did a show called "Patti" based on her persona, it would work. However, casting Patti is another story. Men on TV get free passes all the time-they can be schlubs and get shows. Have you ever looked at the wives of all those TV slobs? They are gorgeous. Even older women on TV, like Jean Smart, have to be attractive unless they are a character actress. I don't think Patti views herself as a character actress. I think she feels she is very sexy-nothing wrong with that, but TV execs would beg to differ.
"The sexual energy between the mother and son really concerns me!"-random woman behind me at Next to Normal
"I want to meet him after and bang him!"-random woman who exposed her breasts at Rock of Ages, referring to James Carpinello