1:1 isn't pointless, it was always the logical answer for how voting should work. The ability to Sybil attack this network was built into it from the start... almost purposeful it seems. Maybe it was a good thing to bait one now instead of later.
1:1 makes a lot more sense for more reasons than just network security. It also makes it easier to elect single witnesses to the top 20 in a much faster timeframe. There are so many reasons to do it, probably the biggest one is just that it makes the most logical sense to everyone who is trying to figure out the platform. 1:30 makes it looks like we attacked ourselves on purpose like idiots. Again, maybe this was all part of the master plan to bait something insane like exchanges attacking us. Obviously this is far fetched, but whatever.