i definitely would not worry about the practice planning aspect of not having 10 scholarship players. ive had it happen to me SO many times when i was really not playing my teams, and a handful of times when i was, and really, its not a big deal. it will hold back your team a little, sure, but that has nothing to do with practice planning. your guys will go up maybe a point or so less in some categories, but i bet if you looked at a 4 walkon team improvement section, you wouldnt even think anything of it (without knowing they had 4 walkons)