I have several thoughts on this.
First I agree with
@bud heishman that better skiers are likely to notice changes vs less experienced skiers.
Second, just because the top elite skiers are doing this it may not help you as much as you think, don't forget they are going for that 0.01 second advantage over the rest of the pack. In some cases the speed advantage is gained through sacrifice of other desired important characteristic.
In that regard, unless an inexperienced skier is really out of wack in setup (this requires a good instructor/coach that understand these things to make recommendations/changes), don't mess with it. I would even extend this to advanced/expert skiers unless they really understand what they are doing.
Constantly tweaking and adjusting multiple settings at the same time does not allow one to adapt to any one setting, this in turn gives false feed back and can take you down the garden path so to speak, so that you never find the correct set up because everything is so far off. You will never be happy.
When I make changes I always change one thing and ski it for several days to ensure it's not just a "I like this because it's better not because it's different issue". The several days let's me not notice that change and only notice the change for better or worse.
While this thread is about binding/boot set up it applies to all setup issues. Think of any change as an ROI, what do you give up vs what you gain and is it worth it.