Allow to select objects as a range in Layers (Shift, Cmd/Ctrl) with proper square markers, not only with Target Appearance ones
I have no idea why the team chose to use specialized Target Appearance round markers and NOT the intended square markers to allow select the range with Shift. This teaches a bad lesson, making users think these round markers/buttons are meant to select objects, while it’s just a side-effect of targeting these to receive new appearance. This makes users believe they Select All in a layer when they click its target marker — and this leads to common 'all my stuff in layer has the same fill'.
My only guess is that that the actual selection markers/buttons, square ones, are basically invisible unless clicked (or objects get selected on canvas).
Anyway — Ai HAS to support selecting ranges with the PROPER markers as well as it does with the improper ones.
Also, notice how filtering Layers breaks this feature, allowing to target-select within uninterrupted range, as reported here:
Shift-clicking in Layers doesn't select range if filter is used
http://illustrator.uservoice.com/forums/601447/suggestions/51241408
The original request to allow select ranges in Layers: http://illustrator.uservoice.com/forums/333657/suggestions/19196674