Comentário oficial
Big changes take more time, resource, planning, testing, and execution. Small changes and bug fixes are easy. The updates aren't on a schedule, and certainly aren't every 2 weeks.
If you're looking to make suggestions, please post them in the Product & Feature Suggestions forum section. There's no guarantee that if you post it here, it will be seen by our product teams. If they've already been posted, then they may already be under consideration for future implementation. But to answer some of your comments...
The way search works is fine. What if I want to search within a playlist? If I wanted to search my whole collection, it's not hard to click on Collection.
There is already a Tag List feature for exactly what you're asking for - to temporarily hold a song that you want to play later.
No, there's currently no automix function, and personally, I hope they never include one... but that's just my opinion.
The related track feature is to find tracks related to one of 3 locations: The master player, one of the decks, or the track currently selected in the list. If you found "LOVE" in the collection and it matches "HOPE" but now you want to see what's related to "HOPE," it's in the results list - you are correct in that you must either search for it or load it to a deck. The reason it doesn't allow an easy cascade to the track related to that track (2nd relation), is that related track may not work with what you currently have playing.
1) Click here to open the Playlist Pallette