This post is mostly for PvP.
This might see some play in pvp after the recent hotfixes buffed lava burst even more, but it still lacks a bit of oomph as a talent overall imo.
It would be nice if something additional was added to this talent. Maybe “After casting Icefury or Frost shock, lava burst does 20% increased damage. *After casting Icefury, you also gain lava surge” which would feel really good as you would go into a buffed instant lava burst and make Icefury feel more worthwhile to press. Idk if that would be too much, but it would feel quite good imo.
Edit 2+3: Alternatively, maybe adding another spell to this would help make it less “clunky”. It feels odd to try to fit frost shock or icefury in the rotation as much as it would be required for this talent to get good value. Maybe adding earth shock/ele blast to it would be nice, or even just lightning bolt. I think I would prefer the first suggestion, having it grant lava surge would feel much smoother gameplay wise, but if that isn’t something devs want to do then adding another spell or two to this would help.