Here's what I expect from the beta:
1. Lots o' bugs. Bugs, bugs, bugs. We'll be finding bugs all over the place.
2. Performance issues. EWOM had a ton of performance issues and I suspect we'll still be trying to iron out the memory issues in EFE.
3. Poor AI. We already knew this would happen. The game mechanics have to be built first so the programmers can tell the AI how to use those mechanics. The AI has had the least amount of time on it.
4. Poor UI. Here's where I really hope they listen to the forum. I gave them a hundred suggestions on improving the UI (we all did) and none of it got implemented. While I do see some improvements in the EFE screenshots, I think the UI still has a ways to go.
5. Incompleteness. We've seen dev journals on the world, magic, items, tactical battles, and tech tree so at least we know they're working on those areas. We have not seen dev journals on diplomacy or quests. I'm worried about those two areas being incomplete.
6. Cancer.