I disagree. Fall roster size can be very significant. If a thousand show up and 37 are kept, a player might not want to try his luck at that school. Lots of puzzle pieces to consider. A player needs to go where his contribution is valued. If he is one of many interchangeable cogs, things might not work out good. IMHO
Again, fall roster is similar to a travel team tryout. The coach does not have have to commit until the beginning of the spring. The coach understands he leasing with the option to buy. He already has your tuition $$$ for at least one semester, maybe 2.
He knows there will be players from other colleges that might be interested in transferring (4 yr schools and JUCO) prior to the spring season.
IMHO Fall season is cattle herding.
Note, due to the additional year provided by college baseball, the fall roster will be even more vague.
I would focus on what is normally the incoming roster turnover.