Sounds interesting.
The reason I ask, is that with 2.0 RC1 I had issues where the ACKs for each VPN tunnel were being sent down all the tunnels, creating a lot of excess uploads which in turn really hampered my DSL connections’ download speeds.
Also, since you mentioned a modified mode, I have long thought it would be nice to have a mode where all the data was transmitted over all VPN tunnels but only the first received of each packet was accepted, the rest would be dropped. This would allow for an ultra-stable connection and lose of tunnels should be completely seamless to the user at the expense of the wasted bandwidth.