That's the best seventh pipe posted in a while. Good job.
Looks like the blade portion of the stem doesn't taper much (if at all)
and is quite thick. Slimmer and sleeker would both look better and be more comfortable.
The slot itself is a bit rough & inconsistently shaped, and left unpolished. Getting that squared away is mostly a tools and technique thing... you obviously have the hand/eye coordination and control to do it consistently once you know how it's done.
The bite zone and button aren't visible because you're grabbing the pipe there, but going off the previous things I'd guess they probably have the "standard shortcomings" of early attempts. For those, you need to watch this:
viewtopic.php?f=10&t=8600
As for the stummel, I'll leave discussing that to she Shapemeister Crew. They are as fussy about briar lines, flow, mass balance, symmetry, and so forth as I am about vulcanite/acrylic ones. (Just be sure to decline any invitations to show your pipe to Sasquatch in person. The board's been quiet lately---new guys keep disappearing---and he's been unusually cheerful. You do the math.)
UFOs must be real. There's no other explanation for cats.