That's from over a year ago. The highest level characters are now even higher in levels, so whatever line we draw needs to get higher...
I know things don't always catch on at first and sometimes it takes a few rounds of suggestions. I'm not opposed to changes, but when nothing is done you just wonder if anything will be.
My understanding is that the XP flattened out just above 3k because early on that was seen as an unreachable number, and it was probably close to it. (It's also why 1500 was special and deserving of a special skin reward.) When players started topping 2k and coming up on 3k that should have made it clear there was a need to fix something, and players wouldn't even know.
Now we are stuck with suggesting the same good ideas. Hopefully eventually some common sense catches on.