A tabbed interface would have been great in a case where you can isolate searches within volumes/drives to tabs. To achieve this you either have to run multiple instances or go to tools>options>indexes>ntfs to select/deselect volumes for now. Sorting by "path" attribute is also an option however it doesn't isolate searches to specific volume. If there is a way to achieve this with wildcards, please do let me know.

English isn't my first language, hopefully the above explanation was clear. In case if it wasn't, here's my 3-minute mock-up of tabbed interface I'd like to see in future builds with option to isolate searches to volumes in tabs.

2) Content specific attributes
Basically to dynamically(or manually) change attributes you see on the top-bar based on the filter you select. For ex:
-Audio (name+size+date+artist+album+genre+bitrate etc.)
-Video (name+size+date+resolution+length+bitrate+fps etc.)
-Picture (name+size+date+dimensions+height+width+bit depth etc.)
-Document (name+size+date+author+pages etc.)
Being able to select content specific attributes (in tabs?) and to sort by them would be killer! I don't know if there's a technical limitation to achieve this however I am able to use windows search, even with indexing fully-disabled to filter results in such way.

I think these 2 features will make Everything one step close to fully-featured file explorer, which is a good thing! With most modern computers shipping with fast ssds, multi-core cpus and tons of ram, the app performance and resource utilization wouldn't hopefully be affected much.