In a college showcase, the goal is to get the girls playing time in front of the colleges they are interested in, whenever that coach decides to show up. Some college coaches give club coaches warning, so a coach can plan ahead. Many do not.
Why would anyone think honoring an arbitrary substitution rule that does not reflect college rules is a good idea in a college showcase? Do these results matter?
I know what the goal of a college showcase is - we've been to more than enough. I don't care whether the substitution rule is a good idea at a college showcase. I wouldn't put my kid in that position to ever have to worry about that. The team roster size doesn't change for showcases vs. other games, so your missing the point. The kid is still on a bloated roster in which they are not playing much.