It totally changes the game and it's even worse on an amateur level. Professionals are making 80-90% of their shots, and the sweeping techniques were pushing that percentage higher. However, amateurs are only making 50% of their shots, and this technique/fabric can make a shot go from a miss to a perfect hit. Although the WCF did rule that for local bonspiels (tournaments), any fabric can be used so this discussion for the amateur level is quite moot.