Beasthunter Sejuani looks significantly worse with new particles IMO
The frosted head makes sense with the original model but the Beasthunter skin looks pretty bad. As somebody who owns this skin and really enjoys it, I am not looking forward to spending 90% of my game with Bristle's head covered in a giant block of ice. Maybe go a little bit easier on the huge coverage of ice from her passive. The regular head model of Beasthunter Bristle is actually really cool looking but I am sad that you will rarely see it unless in combat.
You can see the new particles here at the 9:06 mark https://www.youtube.com/watch?v=cRKttb8Cwig