i haven't been on either, but i've been on both lines. personally i like RCCL better, but if i had to choose between the two, i would probably choose carnival freedom just because i like smaller ships better and i think all of those activities might take away from the whole cruise experience for me. when i go on cruises, i just like to relax and just take a break and do nothing. when i went on a RCCL ship, i didnt even do the rock wall.
just remember, it's a cruise. you're gonna have fun either way and you don't need all the extras to have fun.
but everyone seems to love the freedom of the seas. so i mean it depends. ask your kids. see what they think.