A/C compressor question.

It does sound like most likely a bad compressor. Be wary tho, that a restriction in the system will act in a similar fashion, and of course can fry a good compressor as well. You do need to change the drier, and the TXV should not need to be changed, but if there's a restriction, it is most likely right there at the TXV inlet side.
HTH, Lefty71