Have you guys no faith in the players you draft?!
I thought I was bad. I'm leading my league with 17 and I'm 4th in my other with 13 (I'm 2nd and 1st place overall respectively).
I think that if you draft correctly, barring injuries, you shouldn't have to make many changes.
Fantasy sports are typically won and lost with the draft if you have a competitive league.
Baseball probably has the most useful FA pickups but still... a little patience, guys.