What is Megaserver? 1 GIANT shard/server that automatically assigns you into a "gamespace" with your guild and Friends.
Essentially meaning, A system in which you are placed into an instanced version of the world with your friends/guild. So what does this mean?
Hundreds of instances in which CAN get FULL. So what happens when an instance is full and players from your guild or friends log on and can not join you? Will you have to instance hop? Will that even be possible or will you be stuck waiting for open spaces?
I bring this up because Star Trek Online did this exactly. Hundreds of instances in which players from the whole world had to compete inorder to join up with their friends. It was HORRIBLE to say the least.
I also want to bring up "SERVER COMMUNITY". Most of us are accustomed to playing with players who may not be in your guild or one of you Real Life friends. Yet you still enjoy grouping up from time to time or pvping etc. Also, server community promotes friendly competitions between guilds etc.
SInce they did not give out enough details regarding megaserver, As of right now I am inclined to believe that there will be NO server community.
Why? Well, If I am being placed into a random instance with guild members and friends then so are you and everyone else. Therefore you will be playing with new and random players everyday. it's basically a giant version of LFG , LFD, LFR.
With that said; I am hoping that we can get more information from the devs about this. Their brief description of their technology doesn't discount any of the issues I mentioned above. And those issues helped drive STO into the ground.