I came into this thread to straight up gloat. I just got the "Flawless Victory" achievement. This requires you to finish a tournament of 6 tracks in order, without a fault. I'm embarassed to admit I spent over 5 hours this past week to get this done, and honestly I wouldn't be surprised if it was closer to 7 total. I was determined, but don't do well with pressure, so I crumbled near the later part of those 6 tracks many times, including moments from the finish line of the 6th track. It's just so challenging to not make a single mistake over 6 tracks, especially on the hardest ones in this tournament.
Also, where the hell is the DLC announcement for this game? Surely they've got to have something in the works.
There is some new RL tracks for the summer of arcade, but that's it that I've heard about.