why the devs take the lazy way out on low lvl content scaling?

[Silver-Strider]

My problem though, is... Let's say level 50 that seems to be the general metric for stuff being "real content" in any appreciable sense (and as elaborated above by Strider, it keeps creeping further away with every expac). Are you supposed to just be happy doing the same thing throughout all of HW, SB, ShB, and EW content? Or if you say rather it's 60, ditto for SB-EW? And so on.

I think it depends on how they go forward with it. Some classes change how they function once they unlock specific traits, WAR being one of the most noticeable examples since Inner Release is a really substantial upgrade for the job. While some jobs are more impacted by Trait upgrades than others, it could still be an avenue to consider in addressing the issue of classes becoming stale