I don't think acid cut-back has the same connotation of multiple glass layers that cameo has. I have seen cameo used for non-layered (cut, usually) glass, but I think in general these days it does imply it. Once again, the terminology is inexact and variable.
In this instance, I would say cameo cut is definitely a misnomer, since it's etched.
I'd be surprised if it's Honesdale. The giant ground pontil would be unusual for American glass, and it seems like Honesdale's work was generally more stylized.
I agree, it's a lovely piece! You manage to find a lot of gems, I'm envious!