To fill out your minors, yes it's important to sign some of the lower drafted guys. I normally sign everyone I think can contribute in any way at ML level then skip lots of the 200k, can't contribute types, then sign lots of the lower guys. Thus off season a lot ofor your minor league guys will retire and you'll need these draft picks to fill that void. Not to mention, it's good etiquetteto keep your minors with full teams and fresh players (it's can get you kicked out of some private leagues)