That alone's not such a big deal--as I edited into an earlier post as you were replying (so it wasn't in your quote, not sure if you saw it), I don't see any real reason to not leave selection open for a day or something after games are no longer being accepted, so it's easy to pick last minute postings if need be.
the issue at hand is that we have a rule against double posts. personally i don't think it's a problem. if a team cannot remain in open communications, it's their own fault. still, i wouldn't want anyone to feel put off by this possiblility.
let's take a step back and consider this in light of the (newly implemented) average team submission bonus. as i understand it, this bonus was designed to:
1) provide something to teams whose players submit official games early in the round;
2) complicate "score scouting," (that is, waiting until other players have submitted games in order to give yourself a concrete goal to beat);
3) provide an additional type of bonus point to take some focus off score and game speed as the primary means to earn bonus points (especially since earning the correct victory type seems to be a no-brainer at this point in the league's development).
4) create a bonus point where the team strategy and communication are the primary substance behind the point--that is, the bonus point is not awarded based on submission to the metaverse, but official confirmation with the MVL, so as not to reward players with fewer RL commitments but rather teams who are willing to risk less competative scores and speeds in order to secure earlier submission confirmation.
did i miss anything?
as i see it, the question of whether individual players or team captains have to execute the official submission bears most directly on how each team is managed. comapring my experiences on team A in round 3 and team C in round 4, the captains had very different team management styles. FB sorta reminded me of a drill sargeant at first (no offense intended FB

) whereas DA seemed more a hands-off type of leader. this isn't to say one style is better than another, not by any means. i would want to encourage diverse leadership style as much as anything else.
looking back on precident, individual players have had to submit their own games. all things being equal, it seems to me that we should continue this paradigm: i think it would be least disruptive to how things already work. giving captains primary submission responsibility, i think, could leave players feeling a little robbed. i think for many of us, posting our scores into the round submission thread it one of the most enjoyable parts of each round--even when our game stats are nothing special.
still, the points raised about players going incognito mid-round are worth consideration. i'll describe now what i think is the best solution to these considerations--kryo, please tell me if something i propose is impossible or more work than it's worth.
1) each (Alt)MVL character (such as mine, "The Blind Bandito") is assigned a password, and under normal circumstances, each player will have to "log in" to the league space on the AltMeta when they wish to confirm a submission that round.
2) after selecting a game within the correct time frame for the round, they'll go to a confirmation screen; it'd be lovely if this screen could warn them if they, say, picked a game with the incorrect victory type.
3) in the event a player goes missing inexlicably, that team's captain may select a qualifying game for that player, but
only at the end of the round. this will disfavor anyone who suddenly and totally loses internet access, but personally, i really dislike the idea of a captain lording over his/her team's scores and calling all the shots. this should be cooperative, and in that spirit i think power and responsiblity should be more spread out, not less.
4) if the captain's passwords could be set up such that they could submit on behalf of another player at the end of the round, without losing the ability to identify that someone else is submitting on behalf of a player, it would be great.
4.5) (i'm assuming there would be some sort of tracking screen for the round in progress, where players and teams could turn to see who's submitted what so far and on what team. it'd be nice if the new software or whatever we'll use could correlate the password used to submit a game to something of the identity, so if i confirm my submission for "The Blind Bandito" with my personal password, it could display "Submitted by: player" but if i broke my face and FB had to do it as team captain, it would display "Submitted by: team captain".)
5) co-captains could be assigned for each 'season,' and they can take over captains' responsibilities in the event a captain goes missing.
6) should a player have some means to electronically contact his team captain to say something like "i can't submit to the alt meta because my dog's on fire, could you pick one of my games for me?" the captain or co-captain may submit on that player's behalf immediately rather than at the end of the round, but only after forwarding or showing the message to neilo, FB, Silver or Mumble--some member of the league-wide leadership.
...okay, sorry for the rediculously long post. perhaps it will spark a more lively discussion from the league as a whole.