Francis - It is all across the board for D2s. Many D2 programs dont even have the 9 scholarships to use. Many use large rosters for tuition/enrollment generating purposes, especially private schools in many cases. There is a private D2 in Texas that has 62 listed on their roster. I do believe they try and get some JV games in vs. some of the local JUCOs. My son started out at a D2 in Colorado and they had 45 listed on the roster, with 9 of those "red shirted" with no number assigned so in essence, they carried 35 or 36 active players. Many D2 schools that we looked at will typically carry between 32-40 kids. I think the roster history is a great indicator of future roster sizes. Just know that there still may be 50-60 kids in the fall fighting it out for the spots and then a few D1 drop downs potentially at the winter break.
Many D2 schools that have good programs would regularly beat mid-level D1 programs. Angelo State, Colorado Mesa, Tampa (and many of the Florida School), UCSD etc all have very strong clubs. See last published poll for a list of top programs
http://baseballnews.com/colleg...l-div-2-poll-3-9-20/
I don't think that you can just look as a classification and say one is better than the other. There are many JUCO programs that are primarily D1 drop downs or kids that could have played P5 who want to improve draft stock. No one size fits all. It has to be a good fit academically, financially and most obviously baseball wise. Find a place that your son really likes and most importantly, is getting the love from the coaches. I think things will be even murkier now with the extra year of eligibility that everyone has and will just create more pressure to find a good fit. Good Luck!