Hi, I'm premium user of Evernote.
I suggest that in the Note & Tags Tree panel, a filter button with Drop down arrow to be provided so that when we filter the Note or Tag , than in the Note & Tag Tree it self only the filter Selection is displayed .
Secondly filter should also allow the multiple & non adjuscant item selection.
And till the time filter is checked off it should get displayed.
From productivity perspective this will be very helpful since e.g If i have tags for project 001, project 002, etc than I can filter say Tag Project 001 , and all notes