MoveToGroove,

I fully support your ideas., especially "modular" approach. But that can only happen with what pipeline said above:
"There should also be a Custom menu that the user can have any functions just like the icon one but a choice of ALL functions."

Or at least more functions available...

I guess my main concern is "placement" of these beginner menus you proposing. As I can see there is only single particular space left, which is that shortcut icon bar. There is room for 2-3 more tabs. Otherwise, I think any addition to other space will intrude on real estate of GUI, unless new items are fully collapsible as in BIAB plugin.

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