Can't say it's any bit of an improvement from your first as they're two different styles. I can say, however, that I really like this one too!
I could critique and say what I might do differently (which is actually nothing in this case, save for a more flush stem to shank connection like Kyle mentioned) but ultimately it's a matter of taking whatever it is you want from your mind to the block of briar before you. With perhaps a little inspiration from the grain here or there. If you're happy with what you've done (you damn well better be) then great! If someone want's to buy that particular pipe from you, if that's your goal, then it's a bonus! I know I would.
As for the pit... I'd take a pit over a fill any day. I sometimes enjoy one here or there, it adds to the "organic" feel as I mentioned I like before. It's wood, it's never perfect. I've learned to love that.
Keep doing what you're doing!
Very well done.