You won’t be seeing any legitimate arguments in a CBT with people saying: "This is unfair. All of these people get to keep their high level characters from the last CBT, but I’m new so I have to start from Lvl 1. There’s no PvP besides 1v1, and the Data is being wiped before OBT, but I still find this wrong!" There’s no disadvantage to someone having more funds or a more developed character than you when all of it will be erased in a short amount of time.
It was suggested because we’ve been given over a Month to test with KCBT rates, and 2 weeks of that being an EXP Bonus. Most of the high-levels aren’t coming back here to go through the same process again for the 3rd CBT (With the exception of the people who want to PvP, IF we even get the PvP Arena at all) just for a few extra maps after 200. At least with the character carry-over, they keep a lot of the experienced players who are already familiar with the content and current bugs so they know what to and what not to submit when making a report.
I’m highly doubtful that there will be any data corruption of any kind, since we’re talking about CBT 2 -> CBT 3 here. It’s as simple as closing the servers, adding their bug fixes (Like every maintenance) and those extra maps, then re-opening at whatever future time they see fit. The same issues you see now, can be seen 3-4 months from now in the next phase if they make no attempts to change to whatever it correlates to-- wipe or not.