I also play EU.
Are there any US or ASIA based players here that noticed the same increase in damage?
Otherwise this may be some bug on the EU servers.
Edit: Maybe they just switched "-" and "+" and instead of -25% monster damage we got +25% :D
Me here in EU as well. Feeling the damage is not properly scaled as they announced.
Oh yea...guess they should rebuff our defense back in the name of "balancing" the game, if this assumed bug is real.