Hi Hudson!
This has been given as an answer in few other threads as well, but manually dragging stream snippets from a track to another is only good for trivial projects - but then a track contains dozens of snippets, carefully time-wise aligned, that soon becomes rather nightmarish.
I am a new user, and my very first little video (less than 3 minutes) already had 11 tracks and countless snippets across those tracks - unfortunately, the project needed to be recreated two times over until I understood the correct number of necessary tracks and their order. Would I find myself yet again in a similar pinch, I would rather try to mess with the project file than start dragging snippets manually… 
I for one, will welcome the capability to reorder tracks with great delight, once it arrives.