I have big question about Events possibilty and so on

You can find events such as Ironman or Protect Andariel under the event section http://forum.europebattle.net/forums/events.1017/

 

You would have to modify the core setup regardless in order to achieve something like that together with multiple required updates and global restarts as well as with various game limitations, possible frames drop issues for some people, unexpected crashes and so on. Even if we would come up with something like a separate game server or something that can be selected individually, there will still be limitations and at the end of the day, this game is not really designed to host temporary global events such as double drops or experience for a week or so as some MMO games tend to do mainly because they have a persistent world unlike in Diablo II where seasons exist. One can catch up with anyone just by playing the game though, especially with the already increased rates and fast progress we have here.