It may be due to high ping but have any ESO dev's commented on when doing frontal aoe's like Wall of Elements of Breath of Life, the character stops for a second. The only way to stop this seems to be by jumping or not moving your mouse the slightest bit. I may be getting this due to my high ping but when a build has many of these skills it makes the combat unplayable. I found this older video showing what I mean.

https://www.youtube.com/watch?v=epw1IpIZ4L0