Response from Ryan via email regarding expansion (posted with his approval - he's maintaining his Redscape boycott):

I just want to point out that there are 254 "starting" position players across all 30 major league teams. That doesn't account for platoons and such, but if all 30 teams are playing on a day, there are 254 starting position players that day. In our league, there are 168 starting position players. That means 2/3 of all major league starters are starting in our fantasy league. Adding 2 more teams would bring those numbers to 192 and 3/4.

Now, look at the players that were on rosters at the end of the season: Tsuyoshi Nishioka, Pedro Alvarez, Alex Rios, Gordon Beckham, Brent Morel...

Look at the players that were on a roster at some point during the season: Nate McLouth, Chris Denorfia, Chris Carter...

At some point, the quality of players available as free agents degrades to such a point that your team loses nothing by leaving starting positions empty (because the runs / RBI / SB available are negligible) and would be hurt by putting in a .650 OPS player (average team OPS in the league is .750, anyone below .700 better bring a ton of another stat to justify starting). The same principle applies for pitching, especially starting pitching (since all 30 closers are rostered anyway). This already happened to me for quite a bit of time this season and could have applied for a couple of positions in the last month (C and SS were drains on my roster for September), but I was out of the running anyway, so I started players.

It almost makes it a viable strategy to start just a couple of great offensive players to win OBP and SLG every week, then flood your team with closers and setup men to win ERA, WHIP, and saves every week. With a $260 budget, you could spend $175 on closers ($25 x 7 for top-quality closers) and have $85 to pick up 3 excellent hitters and a couple SB threats. That's taking it to an extreme and is unlikely, but I feel like the more extremely awful the FA wire gets, the more extreme the strategies in roster composition may get. You don't need to win 8-2 every week like Todd if you can win 6-4 or 5-4-1 no matter the opponent.

I'm not saying I'm opposed to expansion, but I do want to bring up the point that from a fantasy baseball perspective, starting 1/2 of the San Diego Padres' starting lineup isn't exactly fun.