Hello,
This is a topic of discussion that has been brought up a lot as of late, with the new V2 update. You're not the only person who has brought this to our attention, it has been mentioned several times in the Staff Q&A as well. Allow me to go into detail about why we are using this new system.
With the V2 update, it's important to understand that we don't actually have 2000 SG servers, these are randomly generated numbers. The way it works is that a server can switch to any gametype. So, say a game of ColorZone just finished, but nobody is playing anymore. The server would then switch over to another gametype that is receiving more attention at the time, such as MCSG, and would generate itself a random number, typically in the thousands.
While this may appear to be an inconvenience at first, and difficult to adapt to, unfortunately, we have no current plans to revert back to that setup. With servers "leaving" and "arriving", getting a server board to function would be too much trouble for the developers. Don't worry though, you can still play with your friends quite easily, by adding them to a party, so they automatically warp to the servers that you join.
Since V2, a lot has changed around here. We understand it may take some time getting used to, but hopefully you'll be comfortable with it in no time. Rest assured, the developers are hard at work making sure you guys aren't disappointed with the updates. Some things are still a little unstable at the moment, but it'll all be fixed up soon.
QA;TL. Feel free to PM me if you have any further questions.