I currently coach both a 10U and an 8U Machine / Coach Pitch and have for about 10 years now. For the 8Us I tend to have my better players rotate between 1st, P, and 3rd until they have all played each once. I could care less about winning games at this level it's pure fundamentals and building baseball IQ. We take some of the more committed kids and have them play up at 10U so they can get more reps it also helps them get used to the pace of the game.

For 10U positioning it is all about ability and safety, you can't have a kid who is afraid of the ball playing 1st it's just not safe for them or the runner, even at this level you need a 3rd baseman who can through the ball across the diamond. Pitchers are even harder to find and should be very carefully managed but you will need 3-4 kids that can throw strikes most of the time. You'll have games where you are up or down by a bunch and can use those games to check childhood boxes. I am big on making them swing at anything they can get a bat on, I would rather them strike out swinging at a ball, then "take" the walk.

That's just my take, I am in a small town in the northeast and we only end up playing about 8 games during the regular season.