I find the whole situation quite predictable.
Before anyone accuses me of being a shill, I was absolutely team Kronos before any of the new generation of servers launched. I used to upvote the Kronos comments, follow on facebook, twitter etc. I'd recruited a group of old school players who were all hyped and ready to go for the new year release. We were hyping the project up and the regulars here were crying out for more videos, more hype, more promotion... we knew previous projects had died due to low population.
When Kronos was delayed, Nostalrius jumped in and stole all the hype. My friends rolled there and thus so did I. I suspect many other groups did exactly the same. Now we're all level 60 and it's going to take something big to get people to drop 10+ days played and transfer over, we need to see a major difference in server quality.
Despite some opinions on here, the competition from Nostalrius is tough, the server does function very well. My quest history shows well over 1000 quests (I do everything), so far I've found 8 bugged ones. I played 10 hours yesterday without a rollback. Population is astronomical.
So what can Kronos do to draw players over?
Get really stable, really fast. Rollbacks are annoying when they happen. If I saw Kronos was up for days at a time without a crash and Nostalrius was repeatedly crashing, that would definitely give me a poke to reroll here. Otherwise, you're relying on the other guys somehow massively dropping the ball and pushing the community over here.
It's a shame because I do believe Kronos will be the better scripted server in the end, but the gap in quality will never be enough for people to jump over.