I like both for different reasons.

This way we don't have to sit through 3 shows a week. Usually each season one gender if much better than the other so that makes the "bad" gender a tough night to watch.
But this way the judges and producers may have a little too much control.

I'm excited to see Kara in a live show. She is probably my favorite judge. She seems to keep it real even Simon shows favoritism or holds certain people to higher standards.