<human>: Can you give me the gist of the text in a nutshell?

So my 3-year-old had his first soccer practice with the local Y's "soccer school" last night. I know they're tiny little kids and it's just for fun. I didn't expect it to be anything serious, but it was waaaaaaaaay more of a clusterfuck than I expected. I'd like some input on how to give a piece of constructive criticism without being an offensive jerk or being disregarded.

Basic situation: 

There were four U5 teams practicing at once on little fields right next to each other. The other three teams were doing fine - parents sat on the sidelines, the coach and assistant coach told the kids what to do and helped them figure everything out. Those 3 teams were about as disorganized as you'd expect 3-year-olds to be, but they were moderately productive, the kids knew who to listen to, and the situation improved as the hour went on. 

Our team? Every single kid (except for ours) had at least one parent on the field with them. The noise level as parents tried to instruct their own kids was overwhelming, and you could barely hear the coach. The kids had NO IDEA who was in charge because there were so many adults on the field, and some of the parents were even giving their kids instructions contrary to what the coach was saying (ie, during a red light/green light game, she'd say "RED!" and some of the parents would be like "No don't stop, kick it in the goal!"). One set of parents even had their 1-year-old toddling around the field while they tried to help their 3-year-old. It was a disaster, and it got worse as the hour went on and the kids got more and more confused.

As far as I can tell, one simple change would fix the whole mess: Get the parents off the field. Nobody on the field except the coach(es) and players. I don't know if the coach didn't say anything because she was brand new and didn't want to be a meanie, or because she didn't know any better or what. Should I go ahead and email her about this, or just keep my mouth shut and hope it gets better?
<bot>: Soccer coach allows parents on the field, and it's absolute chaos. How do I bring this up without sounding like a stereotypical overly-critical, pushy parent?