I will bite. How it's related with ED P2P problems?
Baseless speculation in my opinion. David wanted to do multiplayer since 2000. Server/client system have other serious limitations, and cost is only one of them.
Traffic is already improved a lot. My traffic usage is very low. Server connection usage is very low. ISP introduce latency issues, true, but it seems it's majority of people who spoil other fun. According to Howard, people with low bandwidth can bring whole session down. They working on fix for that.
Again, please show where traffic still causes problem, because from my experience this problem is gone with alpha 4. Current problem is high ping/low bandwidth hosts. FD has started to work to minimize traffic from such hosts, allowing people with fatter pipes to take over hosting of session.
I know you knowledgeable and don't take this personally, but for last months you have been on my ignore list for a reason.