They did -
It's painfully apparent when adding multiple Pipe Networks to a Profile View, and all of the labels come in on the same layer, despite each Pipe Network having Pipe/Structure layer settings.
The issue earlier in this thread about Structure Label placement - which as it happens, has a workaround (thanks again, Jeff!), but even that still has issues if you move the Profile View. The 'pinning' is in WCS, and not relative to the Profile View?!
The issue not discussed here, of Pipe Label placement - Center of Pipe only - really?! Where's Pipe Top/Bottom? Never mind the redundant issue of dragged state leader attachment to pipe.
Don't even get me started on Direction Drills/Bores - just finished multiple miles of a Water extension project, and ended up having to use Profiles by Tangent and Curves via HDPE radii in Curve Settings for top of pipes.
Casings? Don't even bother.
Pipe materials, and sizes? Painfully inadequate... Seriously, you didn't include 16 PVC?
Pressure Pipes? In Ductile Iron only? See previous. Even after you take the time away from billable work to setup the myriad materials, classes, pressure ratings, radii, pipe walls, etc. via Content Catalog Editor,
Civil 3D doesn't properly recognize them.
... All of which I'm working to address with the product teams, some of which have been accepted to-date, so don't go holding your breath, though.
Haha
Cheers