I think one of the things that made the whole thread difficult, was that I don't think anyone really understood your question or could relate to it. I play with IEMs 9/10 of the time. I actually find that with my IEMs and a good IEM mix I set myself, that I can hear much more clearly any dynamic changes in the rest of the band.. ( two guitars and drums ). If I feel the guys kinda go quiet I notice it very quickly and it's much more obvious than it used to be with a loud stage volume. A previous post did say that maybe the other guys don't have a monitor mix, IEM or not, that allows them to work with dynamics.. In my experience, using IEMs allows you to hear everything better, including and especially dynamincs. So I'm trying to understand what you're trying to explain exactly since I don't experience it. I believe you're struggling with something and I'm wondering if it's not actually your IEMs. It could be, but all I have to offer is my experience. Could you try and explain again as clearly as possible what you are having problems with?
OK. No, my IEM's work just fine; except that I am still on canal based buds vs molded; so they do come unglued at times, if I'm singing or cracking a smile.
Again, my comparison is between amp on stage bar gigs and ampless IEM bar gigs. In the amped format, any band I've gigged with the past 20 years has kept stage volumes where we could communicate with each other to adjust dynamics on the fly. IME, dynamics are a large part of what makes the performance successful. Having a bunch of decades of clubbing at this point, part of my role in bands I work with is keeping dynamics happening on stage. Things get softer or louder depending on the tune; which sounds really easy; but how many bar bands actually do it?
With IEM's stuck in my ear, I can't manage by walking around any more. Everyone is in their own little bubble. Sure you hear things better. But, how do you interact, if something isn't right? Or, how do you even know if something isn't right? Since your own personal feed is essentially perfect, but isn't what the audience hears. Obviously, this seems to be a pretty obtuse question; because, I keep trying to explain it, but, it's not computing. Bottom line is that dynamics have always been an interactive thing for me. IEM's have kind of put a stop to that way of playing.
It's true that, in orchestra, no one is managing dynamics by walking around. You rehearse it. And rehearse it. And rehearse it. You get the idea. But, there is also a whole lot more interactive listening going on and no one is singing and playing at the same time. And, you're not doing four hour long sets with 12 tunes per set. Every situation is different. I'm just talking about my experience gigging clubs and what I see as different moving that kind of act to a very different sound scene.