Wanting a mixture of abilities within a team / squad

Hi - In Under 8s, if I have 4 players in my squad and I need to recruit say 5 or or 6 more, and if the current players I have are lets say 'lower level' and a couple are not that keen on running around - is it unreasonable of me to want to recruit a few better players who at the very least do want to run around?   Or should I accept all abilities even if that means potential hammerings and the disillusionment that could follow that?   Am I wrong to want to have a balance of abilities so that also in training the better players can bring on the less developed? What is the correct approach at Under 8s?