Im a massive fan of the empty arena fights. Being able to hear that is so much better.The crowd-less Top Rank cards have been pretty entertaining, especially the last one. In fact, it's great to be able to hear the sound of the punches, and the corners shouting instructions during the fight. I love it.
I guess they need the ticket sales to cover costs, but heck they could just pay the fighters less. It's still better than waiting another 6 months to a year for most of the big fights.
Though Maybe if they just had better microphones they could still pick up the punches landing and the corners talking a lot better