The only time one actually cares about the ball colour is when they're playing with them. It changes literally zero about the game. That said as long as a quality set of balls are available in the traditional colours, I will not purchase the altered set. The romanticists really need to move on.
My thoughts on the balls/cloth are different than the other opinions and Matchroom's explanation. Personally, (and I have absolutely nothing to substantiate this theory) I think that Matchroom is simply differentiating themselves from the other failed attempts at marketing this game. They want to have veiwers tune in and instantly know it's a Matchroom production, and not the old tired and busted crap. There will be a ref and no commentators sucking on their gums.
Emily in front of the camera is also a refreshing change from the old men that typically drive this game into our homes. Heaven forbid the game has a front runner that may still be alive in another 20yrs...lol
It appears the bulk of the grumbling is coming from the NA membership here. So Matchroom has what 20-25 people annoyed enough to make a post on the forum that sways nothing...?...lol