I'm still very interested in seeing a version of this implemented. I believe at this point we've been working at getting past the lack of support issue. It seems that many people are interested in this being implemented, but never show up to voice their support.
I think it also needs some figuring out of the details for how terminator and assassin would work, but the support problem seems to be the big one.
In terms of how it would work, the only difference I would suggest be made to the above suggestion is to have the points awarded when a player is eliminated, rather than a team, but even then I'd be happy with both implementations.