Would you see a problem In hitting tee balls with a composite bat? I wouldn't think so seeing how soft and forgiving they are. Never used baseball on the composite bats but we have hit them with an aluminum. When we do soft toss with baseballs It really seems to help her hand eye coordination In the games.
No problem there...but again, I would get a cheapy comp bat. But I am VERY protective of my gamer bats. You have to remember, even though its soft toss, you
are hitting hundreds of balls. Unless they were wiffles or foam, I would use a cheapy.
Never hit baseballs with new comp bats