2007 17u WWBA, we had one of those "unique" teams...put together pretty much for that tourney...college showcasing...18 were rostered...5 did not make it...1 was "emergency" player...we had 12 playing regularly.
One or two were strictly pitchers...two were strictly position players...so we had 8-9 two-ways. Worked out well in our case (some rain may have helped), but can see where pitching would be an issue trying that consistently. Every now and then, would look across to see 25-30 in other dugout. We played some well known teams good games, ended up in top 16.
Of the 13, I believe 2 are not playing now (one because of grades), 3 @ JC's and 8 @ D-1's.