Considering that I use the B38 often, I'll pitch my two cents.
I won't deny that Metropolitan isn't the best terminal, it is the middle of nowhere, but still no one has proposed another suitable one. Frankly, I think Metropolitan is the best terminal you're going to get in that area, and no extensions, please. The B38 is unreliable as it is, any extensions would make it worse.
1. Hoo boy... you looked from a Q39, into a B57 (so there could have been distance) and this is decisive proof that buses get crowded past Metro? The windows are tinted, and plus, I've been tricked into thinking buses were empty/crowded based on the way people were standing. You could have simply been mistaken.