teeth, you are really onto some odd argumentation there. Having to learn to play? Are you serious?
Also you say they are exactly the same type of servers, yet different types of players play there. Isn't that different enough, besides other maps?
By erasing EU_4 you would certainly do more harm than anything. And you want them lone noob wolves who can't deal with teamplay on EU_1? What if they don't learn to your satisfaction? I think you don't mean it in that sense, but still, removing EU_4 to force more players into EU_1 is a terrible idea.
When I say that they are the same type of servers I mean exactly that the servers are the same, not the players. The servers are different because EU_4 has different set of players indeed.
The reason I hear for people not playing on EU_1 but instead of EU_4 is because they don't like infantry gank squads with pikes, it is mentioned repeatedly in this very thread. That is exactly what teamplay is in this game, so the people that are on EU_4 can't deal with teamplay. That is a fact if the reason stated by Osiris is correct. So because they don't like fighting against teamplaying teams they join a different server where they can be heroes on their own. EU_4 is the noob server and you know it.
Not noobs in bad as invidivuals, but noobs as in bad at teamplaying. Besides, EU_4 is a bigger server than EU_1 lately. If EU_4 would be removed (or EU_1, it is the same server anyway) they would be forced to play with the rest of the community, who happen to be able to teamplay and fight in groups. For most of them that would probably mean that they would learn to as well.