I agree with everything the OP has stated as an ele main since WOD! Some extra thoughts expanded below…
I personally would love to see a change to primordial wave that lets our next Earth Shock/Elemental Blast also hit targets with flame shock alongside lava burst (if we choose) even if it has to be at like 50% damage on secondary targets, which would be huge for spread cleave and could work well with mountains will fall overloads (and it would look and feel really cool)
Also, I would really love to see just something done with earthquake where at least SOME of its damage is done instantly, or make it tick faster and increase its AOE size by 2 yards. Examples of this would be Shake the Foundations Shake the Foundations - Spell - World of Warcraft (wowhead.com) or the old BFA talent Tectonic Thunder - Spell - World of Warcraft (wowhead.com) IMO any of these would be a nice QOL for us as normally earthquake does not feel good to use in any situations where the targets move out of it or die too quickly to even take damage from all of its ticks.
On top of this, please remove flame shock’s cooldown finally. Boomkins and Destros have 0 CD on theirs, it would help us tremendously with our spread Flame Shock Skybreaker playstyle and not make Liquid Magma totem and Surge of power the only ways to spread it in a decent amount of time.
Also, please do something for Fire Elemental, Fire Ele does not feel like it should be a 2.5 min CD whatsoever, we really only like it for its flame shock benefits and pets already are very finnicky when it comes to some mechanics and platforms etc.
The 30 sec duration of it never feels like it’s enough either…that’s why the Tier set in Sepulcher felt so good for us, it allowed us to have the pet benefits almost permanently, which other pet classes just get naturally. (locks, hunters etc)
Ascendance needs something to spice it up like the ability to spread lava bursts to flame shock targets naturally or maybe give the lava burst a Dot portion to it or give us some free 0 cast time lava surges/lava beams every few seconds while ascendance is active. Just spitballing ideas here to make it feel worth pressing.
I really like the idea of baking crit damage modifier into natural lava burst a ton and taking it away from needing ascendance for it. it solves our crit scaling issue in single target and it allows us to gear for a fight that has both ST priority AND AOE priority.
Lastly, I would like a short mention of our defensives also, we lost Primal Earth ele wall and don’t have much in place of it. I don’t think we need anything massive, our off healing ability can be very nice with things like AG. I would definitely like to see Astral Shift able to be used while stunned.
If we go extra spicy, maybe something along the lines of an extremely short duration immunity where we get encased in earth and become immobile (like 1-2 secs?)
The lava burst crit scaling naturally and flame shock cooldown removal and the earthquake changes are the biggest things I’d love to see by far, the rest is merely a copium wishlist.
Thanks for listening!