Rupaul kind of mentioned it, but I thought the same thing. Sherry is doing the same schtick over and over. Even in the mini-challenge, her cat had that same persona. At this point, even if we hadn't known about Sherry's off-screen stuff, I don't see how she's made it this far "safe" or in the top...there's nothing special about her. Not in runway looks or in talent to be pushing her through to the Final 4.
And I get a lot of her things are heavily edited out, but we can see what she's wearing and we can see her whip out the Katherine Hepburn routine or character like it.