showing layers under the comp instead of double clicking everytime !

so everytime we want to tweak some details / sliders .. extra we have to double click on the comp
to open in new window
then clicking tens of time just to change something then clicking back to the main comp,
and we find some settings not fitting yet, and we back again and again ...
( you get the idea ) its a " pain in the a** "

so instead ,, why don't after effects Devs do a simple and easy feature like the one already exist in photoshop 
which is the ((( group Tree system )))
you press the Arrow to ( hide / reveal ) and all the layers inside the comp appear underneath , you click on any of them live without opning the comp in new window ,
and the effects related to that layer show in the side panel ,
without changing the comp view .

and if some people don't like that , simple add a check box in the settings panel for who ever want to disable it .