The fields that would be editable would be configurable
On first read, I didn't get that these would be fully configurable to the users' needs - with that in mind, this suggestion does become more interesting to me as the main tags I access on a regular basis do live on tab-2 (Tag (2) ) of the main editor and are a bit cumbersome to reach (Hit Enter to open tag editor -> click "Tag (2)" tab -> click field one wants to edit -> add/change value - which could be much more streamlined imo).
So this could work for me as a nice feature if this gets me quick-er access to around 7-10 custom tags...
The one thing that does worry me for Stephen, that this could be dev time spend on features that aren't going to be used, is that quite often I do need multi-file tag access for tag editing; and IF I only need to do single file tag edits, I think I still prefer the in-line editing capabilities in column view even in its' current somewhat mixed state...
Which leads me to:
Current in-line edit functionality is right there at your fingertips when you need to do quick tag edits on the fly and is fine for my needs as is.
If there was a way to quickly toggle the 'enable direct editing of tags in the main panel' preference, then this would be my preferred way for single track tag editing.
+1 for the quick toggle 'enable direct editing of tags in the main panel' suggestion, but I've said that elsewhere a few times as I would really love for MB to be easily able to jump between its' 2 main 'states' i.e. a edit & a non-edit mode (including disabling the star rating click-ability!).
Churs.
c.