Heh, I can't let go.
I see, and understand your frustration if a concept that has been put up with a lot of love and work doesn't receive instant approval.
However for the sake of matter of fact discussion you might want to put things a little in perspective here - we're all ml enthusiasts and interested in improving it. That's why I'm not a fan of "habituated pattern shared by ML users" or "habit-skewed thought experiments" arguments: if you simply deny the willingness or ability of others to come up with valid assessment in the first place and dismiss them as "platitudes", that's immunization against critique and doesn't allow for any exchange in good faith at all. I would really like to ask you please cut back a little here?
As for "My core proposal has not been tried": Well, implement it and give us a pull request or find a dev that is enthusiastic enough for it to do it, otherwise the discussion has to be centered on your (very nice!) mockups
I caution people about what "expert" or "pro" product implies regarding usability. Well designed professional products should be harder only for the power and control they provide. Unfortunately the refrain, "this is for experts" is used to excuse unnecessarily cryptic design.
Either you misunderstood or wanted to misunderstand: Where exactly did anyone say that a cryptic ui is fine because we're experts? I'm really having a hard time to comment at this at all, but again the difference is that for "pro" shooting speed is imperative even at the cost of a required higher familiarity with the ui - that's why pro camera bodies have buttons all over the place and a Rebel has a touchscreen, another example would be the single-function button layout of "entry" 60d/6d vs. the multi-button layout of "pro" 5d2/5d3.
These two needs cannot be met 100% at the same time, though there are ways to do something like qick access to features otherwise hidden deep in menus.
On the other hand, new users must give the current UI a chance because they have no choice. They/we are certainly confused.
Just out of interest: Who's "we"? Afaik the current ui is only in the latest trunk and there hasn't been a chance for a wider beta testers group to return their experiences, or am I mistaken since I didn't folllow everything here?
You're focused on 2nd order problems. By taking such a strong position on full-screen (sub)menus, it trades away core benefits of a UI platform that must then be explained away as "we don't need that". I'm confident ml users are smart enough to use full-screen submenus.
You're confusing cause and effect - I don't hate fullscreen submenus and am fishing for reasons to support my position, it's the other way around. I see a drawback in speed that has to be overcompensated by a large gain by full screen submenus - and in search of that gain I asked how much 3rd level menus are required, that's not "explaining away".
The other potential gain of full screen submenus is more space, so I was wondering how this gain is used in your mock up - and imho the left/right icon is nice, though imho not vital since it's very intuitive to figure it out. If you're stating that smart users can use full screen submenus, I guess you're not trying to be insulting but are missing the entire point: it's not about smartness, but about speed - and as I stated that my experience with full screen submenus is negative - and not in theory, but in actual practice on my very own camera just as you want it.
BTW I understand that the current left-hand icons do more than show toggle state, but I feel (well, I know) that those icons are vastly, grossly overloaded.
I am absolutely not against improved icons, though of course limited space calls for more integration. However I don't really feel like isolating the matter of fact arguments from your last post to endorse them because for example the "one hand navigation" seems to be mixed with personal sentiments. Reading back the entire thread is a suboptimal option, because many former ideas seem to have been cancelled to it's hard for me to figure out the current proposal except for the latest mockup - and I commented on this.