Node filters... good idea, almost done. uploading now.
PNG icons...yuck!.. I do not like bitmaps on my network schematics...
one of my main goals when I started on this project was to get nice schematics. Vector graphics are a must if you want to print...
may we can work on the other way around, instead of using png, we can try to get/make all requiered icons in SVG format,
my current icon gallery is just a start
About the ordering of nodes/ports... yEd do not work on that way.
My best shot to get ordered, consistent schematics is to use auto-layouts, then finetune by hand,
then, export coordinates in a CSV File (geo file: devicename,coordX,coordY), and use it as geo file on NeDi2GraphML