Good post Ivo. Depending on circumstance, I can see some of your points. We, too, are in publishing. Some of the rules suck, granted. Big picture? It's pretty good still.
If you want low network latency in a highly-pushed MIDI environment - go OSX/iOS ad-hoc networking. Latency is almost non-existent. Here's my little video explaining this to the Moog user's forum:
http://www.youtube.com/watch?v=TBUPT-CaFG0
And from another musician who was having real latency issues over his wired network:
http://www.youtube.com/watch?v=dt1VgbbUAZQ