I agree that there are some long outstanding bugs but there have been two updates since December.
Photoshop current version is 2017.1.1 20170425 r.252.
ok i will differentiate more.... no FEATURE updates.
but part of me does not dare to wish for a feature update. it may make other features useless too.
the refine edge "update" is imho a complete disaster. i always use the old one (shift + menu entry)
I actually like the S&M refine edge now and I use it a lot (something I couldn't do when it was first launched). However a feature like that should have been launched as an additional option not as a replacement with the original hidden away. That way we get an additional tool to use where appropriate to the image in hand.