I used to think catcher being gone would break the format also.
But in reality, Stage 2 deck's don't get any more "broken". Rotating beach would severely nerf Blastoise, Gothitelle would suck because of Virizion anyway, Klinklang is bad, etc. You also tend to not even catcher out the basics nowadays anyway - you guys are acting like the instant a Blastoise goes up you just lose. It also opens up a ton of creative options and allows a lot of Stage 1's and Stage 2's that previously didn't work to actually be viable.
Again, I'm not one to complain about the format or the cards in it. I don't even think Catcher is that bad; I just think a format without it might be really cool. On the topic of N, it isn't broken, but it's too luck based. We wouldn't have enough draw supporters if it got rotated though :/