That's exactly what I did when I coached t-ball. It worked out great and the kids liked it because they didn't get bored.When my kids did t-ball, I got sick of watching 10 kids scramble after 1 dribbler, so we broke it up. Half the kids went into the outfield and a coach tossed them popups and rolled balls to them. The other half played defense. The 2nd inning, they switched. That kept the kids engaged a bit more and prevented the 1-2 aggressive boys from gobbling up the few hits.
It was a long time ago. I don't recall asking anyone or looking for the other team to validate it. It worked for us.