To play devil's advocate for HMX, I would guess they didn't want the top 4 scores on each leaderboard to look ridiculously daunting... even though with Pinball/Sync, the top 4 scores are exactly that. :X Maybe they wouldn't have found out Pinball/Sync was as/more broken had Flames not been nerfed? I dunno. *shrug*
At this point, I would hope they return Flames to 1,500 and limit future tournaments to specific songs and loadouts. If, by my own logic, a majority of the people were not affected by the Flame nerf, then conversely, a majority of the people would not be affected by returning Flames to their original value.