The 2v2 option with score v2 seems like it could lead to interesting matches.
There are basically two distinct possibilities for teammates: a very high ranked player (e.g. top 100 player teamed with a rank 900-ish player). Or you could have two mid-ranked players (500 and 500ish, or 300 and 700ish).
The use of score v2 in this case should in theory make it more fair for any rank combination compared to score v1, since it's harder for 1 player to carry by just comboing. It should make the average team performance more important than the best player in the team, I guess.
However the 1k requirement also rules out the possibility of two rank 250-400ish players teaming up (which the UK seems to have a lot of
). At this point I'm not sure if anything needs to be changed, just speculating what might happen