SASless
Applying that line of reasoning then to other aircraft...............
You should be able to be low and slow and heavy in a 206............
You should be able to punch in as much pedal as you want in a 407......................
You should be able to push over a teetering system into low G.........
You should be able to fly into icing conditions.....................
Is fuel REALLY necessary??................................
Point is, every aircraft has its deficiencies, quirks, characteristics etc etc, and granted some are of grave enough concern that they eventually find their way into RFMs as a pilot procedure, or a limitation, while others remain as a known phenomenon to be discussed, taught, trained.
Vortex ring state, or settling with power, doesn't imply a design flaw on a particular helicopter (or does it???)
I do see your point on a system that maybe should perform better, but if it is a known characteristic, isn't the first and obvious fix not pilot technique?? As in not pushing over a teetering head, not putting yourself into LTE, or getting into settling with power?