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For point 1:
I know the tournament can be hosted in different realm, which is i don't really like the idea since it didn't reflect frostwolf and like "false" advertisement.

Then for for point 2:...

I believe the real top 3 should be :
1. Anti cheat problem.
2. Server movement sluggishness (see alot of halta's vid for this).
3. Pet pathing.