Instead of download the track, the builder should uplad a replay from an external hoster and link it in the autor comments.
With that you don't have to download and open the map with the editor, but directly open the replay and play it!

I don't understand how this would be easier/different.

no need to save map to the folder and then open it.

and 'till we reached all trackers to change their minds, we should leave it as it is...'till the release