And if his vulnerabilities aren't found, and this is central to his family, even if it isn't with Jean it needs to be talked about, mentioned, explored.
I would turn off if all Sean did was go flitting through each woman, with no character development. I find him quite annoying and quite mean at times, and were he , let's put it this way, less attractive - he would not get the support he does now.
ps. Gus is a pointless character and always has been. He was cast.