It seems unintuitive to me the whole SPEED warning (with ATHR on). Never have heard it in the airplane fortunately. I remember seeing someone using thrust bump/phase advance in the past, but it's been a couple of times I've seen now that is not recommended anymore, with quite a good reasoning mind you! I've seen the aircraft pitch up quite fiercely when ATHR adds massive loads of thrust for a loss of airspeed, I can imagine if one misjudges the phase advance thing, it's a non stabilised approach straight away. This adding energy thing with ATHR on... Dunno, the pitching down thing is unintuitive, and even taking manual thrust is unintuitive because you initially have to pull back the levers...!
If it pops up to me one time my best guess is that I'll just disconnect ATHR and fly it manual and that'll be the end of it.
As far as the initial thread goes, I reckon it's a proper call, it will direct you instinctively to the speed scale, which is what you need in that scenario