Oh, well that's a horse of a different color lol.
Just like IOA, or Animal Kingdom, the two newest theme parks built in Orlando, I think EU will open with a smaller amount of attractions, but more will be added on.
DAK opened without Everest or Kali for example. We didn't even consider it a full day park until Pandora opened, but imagine going before Asia did lol.
It's normal. I just have to wonder if they'll put a rush on Nintendo phase 2, or another expansion, as soon as it opens. Or wait a few years.