3) repeating grades has nothing to do with U15 either you are age eligible or you are not
otherwise good post
With the new USL guidelines, it may not be a big deal. But in the past, it was a big advantage for the Crabs. US Lacrosse used to advocate NOT having anyone in HS play U15, even if age eligible. That is why most good players only play 1 year of U15 ball - because they are going to make a HS varsity, JV or freshmen team during their 2nd year of U15 and thus do not play U15 anymore. But because many of the Crabs repeat 8th grade, they usually have a much older, mature team at the U15 level.
But with the new rules, it's hard to say what will transpire this summer.