The EU Alpha test has received graphical improvements, breakdown of the new additions in the post.
Mission Map Changes
Mission map now has an animated overlay on top of it and particle effects.
Belatos Lancer and several other bosses that had glowing parts have been tweaked.
Skill GFX and Animation Changes
Blazing Fist had animation changes and Sword of Talaimh had some particle effects added to the skills.
General Movement Fluidity
Walk/Run animations have been changed, now its more seamless.