The break wasn't harder in 2013. I honestly believe that the break wasn't difficult at all. it required very little skill, just hit the living shit out of it, and hope. The break was basically eliminated...
Well, we don't know just how difficult it is to make a ball with the new tiny break box
and 9 on the spot... because as you correctly observed, both teams were refusing to try any sort
of soft cut break, they were relying on hit-hard-n-hope, by a gentleman's agreement.
In that sense, the break is "easy" because they stopped trying to control it.
But if you locked shane in a room with a 2013 mosconi cup rack, and a 10 ball rack,
he would definitely make a ball on the break in the 10 ball rack more reliably,
for the first hour or so.
Maybe after many hours of practice, he'd figure out a way to make the mosconi 9 ball rack
cry uncle and give up a ball 90% of the time.
I don't think switching to 10b would be the worst thing in the world, but it would take away
some of the randomness that Matchroom prefers in the break.