I also really like the new keyboard. I use an older MBP for work and it used to be my favorite key design. Now it feels mushy.
For people who like to hit their keys hard, I can see it being a problem. For most though, give it a week and you'll be back up to speed and won't want to trade back.
The main downside is that mine got kinda mushy / misfire at the one-year mark.
I'm currently living abroad, but ideally I'd be able to bring my Macbook Pro into the Apple store next time I'm in the States and get all the keyboard switches replaced.
For people who like to hit their keys hard, I can see it being a problem. For most though, give it a week and you'll be back up to speed and won't want to trade back.