I've been asked to give my thoughts on this matter, and I do feel that a line must be drawn and that this team is certainly not notable for WP. If you think hard enough, every minor or children's league is notable to someone. Notable items here need to be notable to a wide region, state, country, not just a city. I think keeping info about the leagues is fine, I have no problem with that at this point. The junior team articles I have seen so far just say the team name and the city, even though it is already stated in the league article. And they will not get any bigger or better unless a lot of unnotable cruft is placed in, which is the last thing that WP needs. 

And as for the wikiproject, you don't have to obey to the original standards. A wikiproject is designed to give a community for editors to collaborate on a subject, it's not meant to be official policy. I am stunned that an article like this is kept, it is not even close to being notable outside the area of the team, and should be removed, no doubt about it.