Now that I have had time to mull it over, my idea isn't really to use the VF lanyard, but something like it or a screamer to reduce the shock load on pro. There would be no need to carry 4 or 5 screamers when ice climbing, you would just have one "screameresque" device between you and the rope to reduce the impact force.
I just thought that the friction device on a VF lanyard would be nice as it is reusable.
From what Tim said, the personal screamer would have to activate at roughly half the kN of a normal screamer to be effective.
Does anybody know someone to talk to at Yates?