New MLB Rule Only 15 Seconds of Intro Music Allowed

Intro music has become a mainstay with Major League Baseball "Enter Sandman" was played every time former Yankees closer Mariano Rivera would enter to get a save.  This upcoming season MLB is limiting intro music to 15 seconds. This doesn't affect sing-a-long songs like "Sweet Caroline" or "Take Me Out To The Ball Game" or even closer walk in music.  It just affects the at bat music.  It's always interesting to see what some of the players pick out for their music but is it that big a deal that their limiting it to 15 seconds?   This is one of the ways that MLB is trying to speed up the game will it help we'll have to watch the season to see.