Something that I always say in order for these hero specs to be fully successful is the visual/flavor part. One really cool suggestion for San’layn’s improved talent of Wratith Walk, could be to change the animation to that of Carrion Swarm of Mal’ganis of Hots (a swirling bat of clouds) and maybe make it heal you a little bit when it goes through enemies.
This makes sense from a mechanical point of view since they both basically make you an intangible entity with free movement but this one better reflects the flavor and theme of the spec.
Let me know of your thoughts!