So, part of the reason we haven't had much to share about Elemental is that we don't think there's anything fundamentally wrong with the spec. Most of the changes you've seen to other specs in 7.2.5 thus far have been focused around addressing core mechanical issues. We've only recently begun the process of making changes intended to bring each spec's performance more in line with the others.
The bulk of the feedback we're seeing (in this thread and others) is that Elemental is fun to play, it just doesn't deal enough damage in certain situations. That's the sort of situation that we'll solve through what we generally refer to as "tuning" - e.g, adjusting things like how much damage a spell does, the chance for an effect to activate, and so on. Based on the feedback, those sound like the sort of changes we'd consider for Elemental.
Note that how we define a "mechanical change" vs "tuning" can be a bit blurry, which makes it difficult for us to communicate things like this sometimes. Suffice it to say that changes intended to alter the way you play your class are generally considered mechanical, while changes that simply adjust how effective your class is in certain situations are generally considered tuning. That's still not a perfect explanation but hopefully it helps.
Moreover, tuning isn't a process that's ever really "complete." We constantly monitor class performance and make adjustments where we think they'll help, and fully expect to continue that in the weeks after Patch 7.2.5 releases. Additionally, it's important to remember that the effectiveness of your spec is measured comparatively to other specs; in other words, tuning down an overpowered spec is an indirect buff to everyone else. Sometimes - and I'm not saying this is the case for Elemental, because I'm honestly not certain off the top of my head - we'll decide that it's better to bring an outlier down than it is to buff everyone else.
Anyway, the core of what I'm trying to get across here is that Elemental is definitely on our radar as a spec to pay close attention to as we continue class tuning for 7.2.5. We'll be keeping an eye on Elemental's performance as we continue the tuning process.
However do you not think earthshock damage relative to our other spells and substituting earthquake in single target are possible design flaws?