Probably because the rotation you’re listing isn’t the “optimized” way to play? The fact that you list AM > AB x2 > ABarr
when the optimized style is actually AM > AB x2 > AM > ABarr
to get that extra Nether Precision proc for your barrage goes to show that it’s not as intuitive as you’d have us believe. (And I’m sure there’s more that I’m missing out on rotationally there)
Yeah, sure, I’ll give you that it’s a bit nitpicky and is going towards a level of play that’s beyond what is necessary for most players, but it still creates an unintuitive way to play the spec. Just like Spellqueueing. Neither are difficult concepts but neither are explicitly explained by simply reading the spells.
Is it better to use NP on Arcane Blast only? Is it better to use NP on Arcane Barrage when I have 2 stacks of Aethervision? What about Glorious Incandescence and Intuition? Am I supposed to use those right away or should I wait until I have NP for those? Am I supposed to wait until I have one of those two AND Aethervision AND NP to barrage? None of these are questions that can be answered by simply reading the text on the abilities. They can be answered through guides, sims, logs, and perhaps some trial and error. Which means Aethervision’s impact on arcane, specifically the Sunfury rotation, is no less “unintuitive” than spellqueueing.
This right here is your best point: The concept of Aethervision isn’t bad, but the implementation is awful given Sunfury as a hero tree and Intuition as our 4 set. Without a rework to Sunfury or our set bonuses, this gums up the works a lot.
You’re right that Spellslinger is smooth as butter by comparision, but spellslinger is also, unfortunately, really boring to most players (I find it dull and I’ve seen quite a few others agree). I’m not confident there are any rotational differences for a spellslinger arcane mage compared to an arcane mage who somehow has no hero tree at all… I see are Spellfrost teachings (which is RNG and only impacts AoE), Unerring Prophecy (which I think is undertuned and takes away some of our utility to produce damage), and Shifting Shards (which I don’t think is as good as Signature Spell in just about any case). And since two of them are a choice node it means at most there are two talents that can impact your rotation, and neither of them are significant.
The long and short of it is that Aethervision should not have happened mid-season - at least not with its current design. Balancing should be weekly but major rotational changes to classes and specs should be happening between seasons. Aethervision should have just been a stacking damage increase to compensate for the removal of spellqueueing. Things like this should have spent more time in the PTR so that players could adequately test and provide feedback. To me it looks like there was some discussion in the PTR about how Aethervision was going to impact the rotation and it looks like those predictions came true.
One of the main points there is that we have too many things that buff barrage. If Aethervision either only buffed barrage or only provided a charge refund, we probably wouldn’t be in this mess.