There are a couple of things fixed with SW2016 that I really appreciate.
1. In a Drawing, when using the Smart Dimension tool, if I right-click on an edge and choose "Select midpoint", and then move to another edge, Dynamic Highlight works. As far as I know that's been broken forever, or at least as far back as SW2009 when I started using it.
2. Another one, and it's a big one for me. When detailing rebar in concrete I often make the concrete transparent in the model and then use a Shaded View for my drawings. The drawings are much easier to interpret seeing the actual rebar instead of just lines, especially when the rebar is spaced closely. With line drawing views it can be very difficult to tell what's rebar and what's a space between the rebar. However, in the past, I haven't been able to attach a leader to a model edge inside a transparent component in Shaded Views. To attach a Note or Balloon to the rebar I would first have to set the drawing view to "Hidden Lines Visible", attach my annotations, then change it to "Shaded". Of course, if I later needed to add an annotation, or if an edit caused an existing one to lose it's reference, I'd have to repeat the process of changing the view types back and forth. That's fixed now.
I just found a new one. When I copy and paste Notes that are Grouped, the pasted Group is arranged just like the copied group. Previously they'd come in stacked on top of each other so that I'd have to Un-group them, rearrange them, and then Group again.