So I just got my elemental shaman to 75 today and finaly got to experience Lava Burst and I msut admit I like what they are going for with shaman. Prior to 75 I noticed single target dps was nothing too special and felt like it had not gone up or down really from what I did at 70, but I felt improved fire nova, thunder earth and fire, and thunderstorm make shaman pretty good at AoE grinding, handling 3-5 enemies at once is no real big deal and can be a good amount of fun. Now with Lava Burst I also feel I can compete better and hopefully groups will invite me for instances not just to heal anymore.
Lava Burst really makes PvE dps quite enjoyable, the rotation is much more fun then the old one, throwing flame shock and lava burst in with lightning bolt and chain lightning almost gives it a rogue type of feel, always trying to keep my dots up and making little combos with my spells to optimize burst on trash or steady dps on boss fights, but it will take some time to perfect getting out of the lightning bolt spamming is almost hard to do, i am so use to it, but whatever it is fun right.
With changes to elemental we did lose 9% hit, Lava burst also allows us to rely less on critical strike rating and make room for hit rating this is good, don't feel bad about losing your precious crit after 75, spec right you will have 18% crit from talents still (including ToW and Ele Oath). For gear stat priority for me is Spell Power> Hit> Crit> Int (have not messed around with haste yet).
Now my experience is only up to 75, and while I enjoy it a lot so far, just looking at other caster trees I can see where shamans will fall short and hopefully Blizzard will come through with those changes they mentioned recently (changes that will be necessary for elemental to compete for spots in higher end content should they chose to be elemental).
So overall kudos to blizzard for changing up elemental shaman and making it fun, I just hope it stays as fun as it is at 75 at 80!