Say SE does as you say and changes only SGE, AST and SCH to have 2 more dps buttons. WHMs who want higher depth will complain and rightfully so. For simple fact if:
AST who has more to juggle can also have 2 extra dps options then WHM who does not can as well because it is simple.
On top of SGE who is the direct shield comparison to WHM can also have 2 extra dps buttons despite also being as simple as WHM.
Once again - all tanks have a 1-2-3 combo on top of what makes them different: their extra dps. Just because WAR is more simple than GNB doesn't mean WAR doesn't have it. If tank can have that, healers can have a similar build.
To make a comparison, you're literally saying that since WAR is to be the simple tank if it had lost Fell Cleave in Shb, and all the other tanks had extra burst, it shouldn't get it because it's to be the only tank with a 1-2-3 combo. No tank would agree to that. They'd want WAR to get it.
And YES WHM lost Areo 3 and since it is a separate DoT on its own timer and CD you would be expected to use it and Dia in savage. You're arguing against getting it back and another button all because you believe people shouldn't have to adapt their class and stay with all that they knew for an expansion and never grow.
They're gonna relearn how to play their class in 7.0 anyway. I don't see the problem.
Especially considering that both old and new players adapted to SB -> Shb changes of AST and Shb -> EW's changes the latter of which I did.