"A Jagged Gorgeous Winter" managed to crush me twice. First, I couldn't gold it on guitar, then I couldn't 5-star it on vocals.
Can't take on the Harmonix Marathon gig in RB2 on anything but vocals because of Visions.
...and I just found a loophole to make the Harmonix Marathon possible on non-vocals: Take on a random opportunity that replaces the last song. Visions is the last song in the Harmonix Marathon.
The Legend setlists can't be cheated this way. Visions is not the last song in any of those.