With the first server merge for Bless happening just in March, it seemed amusing Neowiz is using “for a smoother gameplay experience” as the main reason for the latest server merge, set to happen on 8 June. As written in the post header, 10 servers will be merging into just 2.
This guide explains the formula you should look to follow, so you don't have to waste time on things like learning the UI or knowing exactly how to get EXP. The general formula for efficiently leveling to 45 is as follows.
An initial look at the Bless Online creature taming system is provided by the devs, showing off some of the hundreds of critters awaiting capture.
Looks like another interesting game and here is the new trailer for Bless Online.