I think platoons are underestimated by most GMs. You can optimize your team greatly by using them carefully.
For those among you following the ATG Barnstormers, you probably know that BruceF and cristano are among the most succesful managers---Bruce F won it twice---and they've been in top 12 every year I believe since four-five years.
And the core of strategy is basically the same:
they pick up between 2-4 everyday players, especially in the middle of the field
they pick platoons at all other five-six positions
Together, that make up 14-15 players.
For example, in the following two teams, one, cristano's team, heading over 100 wins, the other, headed by BruceF, with 97 wins and a championship, both owners went with the same two players in the middle of the infield:
-2nd: Lajoie (8.78M)
-ss Wallace (2.95M)
BruceF fullfiled the rest of the roster with 6 platoons (league with no dh):
http://onlinegames.strat-o-matic.com/team/1396800Cristano (team with a dh) went with 5 platoons and also picked up Gibson for catching and Combs at cf.
http://onlinegames.strat-o-matic.com/team/1410304Another pattern is that, with one exception, they never spent more than 1.3M for a platoon vs lhp---but they spend as high as 4M for a platoon vs rhp.
Of course, the pool of players in ATG is so wide, it's easier to find the best platoons, but these two teams inspired me in trying this team, which combined platoons and injury-prone players:
http://onlinegames.strat-o-matic.com/team/1408470In that team, I had 5 regulars and 4 platoons (so 8 players) and two extras. So it wasn't optimal. My platoons were:
c-Jaso/Hanigan
1b-Lind/Ruf
ss-Gregorius/Romine
of-Seth Smith/Garcia
The team was successful, winning 98 games and a championship, playing all 14 games, but I have difficulties drawing strong conclusion about the success of platoons, because my offense didn't play as well as expected, and because this team was by far the luckiest team I ever had. At one point, my offense had 128 more favourable rolls, while my pitchers had 45 more fav rolls. My team had a net gain of 22 homeruns just coming from lucky rolls, and it had a 21-6 1-run record on top of that. After that point, when the rolls became more balanced, and the team went on with a 45-41 record.
So my conclusion is that platoons are useful, they are certainly an asset if you play in ATG, but in 20XX, it's harder to find the good mix of platoons, although I believe it could probably be as successful as in ATG with the right players.