The problem with changing it, especially now, is the time commitment. When you join a game, the site tells you approximately how long it will take to complete based on the phase length and the historical number of turns. For example, a WWIV game with a phase length of 10 days would take about 267.3 days to complete. To the best of my knowledge, this does not vary based on the victory conditions. So, players who join a game with a higher victory condition might be given a time limit much lower than is realistic. This problem could be solved by resetting the statistics on the variant, but there's another problem anyways.
As has already been pointed out, there is almost always at least one CD in a WWIV game. Increasing the victory condition would increase the length of the game which would in turn increase the likelihood of getting a CD over the course of the game. Maybe the CDs would end up balancing each other out, but it's more likely that CDs come from players who think they're screwed because they're up against a guy with 40+ SCs. Also, this long game would increase the odds that a good player CDs. When a player with even 20+ SCs CDS, you will be seeing some really strange and problematic things.
That being said, if you want to be a 'majority purist' then go ahead. I personally wouldn't want a game which would take that long.