In general, I echo Numahr and Gandalf's assesments pretty much. Even though we had a team drop, we decided to forge ahead to keep from the game from stalling out. And I think most had an enjoyable (albiet rather brief) experience.
The Direct Connect and PBEM server systems set up by Gandalf and Llamabeast each have their pros and cons for game admins to consider and I am sure we are all grateful to both of these guys for their work and dedication. Being able to quickly and instantly download and view all of my teams turns was a plus IMO, though it does take getting used to.
You know, some admins seek to avoid or minimize the difficulties and disagreements that can arise in team games by just going with 2 members on a team (really pairs or partnerships). It may be easier (especially when both players are of the same experience level or know each other), but I have always thought that larger teams give you more of the flavor of real team dynamics, interaction, and group identity. Again, its a question of pros and cons.
I would like to add though, as a generally non-competitive player playing a seemingly highly competitive game, I personally think a team should prioritize their overarching team "philosophy" as follows (this is just me of course, I can't dictate how teams choose to play

):
Goal #1. Have Fun. This is the core reason we play any game.
Goal #2. Learn. The main goal of this series is to allow players to learn how to play the game against both AI opponents and other humans, how to work, communicate, get along with others (even with those they've never played with before), and to benefit from the experience and input of others.
Goal #3. Win. This should be stressed last in my opinion. Winning is nice, but it means absolutely nothing outside of our tiny little fantasy community. But learning how to work together as a group, how to lead or manage a team, how to respect and recognize everyone's unique personalities, now this is something that is a REAL benefit of the team game experience.
Regarding the BI mod, it seems like it did what is was supposed to do, which is limit the AI non-national hordes to mostly archers and other units the creator of the mod deemed most beneficial to the AI. It also has its pros and cons and I am debating various tweaks.
The debate between vanilla, CBM, or any of the other balance mods, well that is a topic that can fill hundreds of threads on its own due to various tastes and opinions.
The game is over, and as far as I'm concerned, everyone did a good job and played well. And I am proud of all of you. As long as you learned and had fun, my goal for the game and the series has been met.
