This was actually an issue last year, there were maps with heavy sv changes. However, slight sv changes should be fine because the map pool is released like a week before the actual match, which gives the players a chance to familiarize themselves to the mapsEtienneXC wrote:
There should be a no gimmicks rule as well (BPM changes, random stops in the song, etc), anything that a player might not be aware of when playing in tournament.