Ok, I will try to make improvements in this area as we go along. If you have more specific suggestions for what you'd like to see please feel free to share. I have been thinking about adding icons to indicate port type, but up until now have also been concerned with unneeded visual and spatial clutter. Keeping things small and simple is sometimes key.
Color coding is another thing on my TODO list, which should help visually deduce node and port types much easier.
Marsel Khadiyev (Software Developer, EPHERE Inc.)