The issue that has me somewhat worried is that while they aim to initially split the population in half they also have to offer transfers to let the community try and deal with the fracturing.
With the "raid" servers remaining in Chaos I expect quite a few people who end up on Light to transfer back to Chaos if they don't have anything to tie them to their initial server, making the initial 50/50 split mean nothing.
Me I'm stuck with Shiva because we have a medium house in a nice location in the Mist we'd likely not be able to replace with how the housing market is so there's no point in engaging full on panic mode but I'm worried they didn't really think this through in regards to what the players will do and only looked at the initial numbers.