Speaking of the Clans, I've heard talk that IC vs Clan fights will be handled on a 12 vs 10 scale - 3 lances vs 2 stars, but this denies the possibility of IC players ever using Clan tech, even so much as an ER laser.
A better solution, I believe, is a modified Battle Value chart, similar to the one on http://www.sarna.net/wiki/Battle_Value. Of course, you couldn't actually use the one for the table top game. Fact of the matter is, despite PGI's noted (and appreciated) keeping to the spirit of the TT game, things aren't going to work the same in a real time sim. Certain weapons will be more or less effective than indicated by the numbers, and work better in conjunction with other weapon pairings.
However, that still doesn't solve the underlying problem of play balance. How will pub games get off the ground if the total BV of said game needs to be exact? Or even if it doesn't need to be exact, what tolerance level could you have before the game says you're too far over the limit? In a 12 v 12 match, we could be seeing BVs up into the tens of thousands based off of the TT rules, and that doesn't even take into account the proposed "Dropship" game mode where you're taking 3 mechs in per player.
My suggestion is then to throw out balancing the matches themselves, and instead balance it through awarding additional XP. I'll explain: if a team is going into a fight outmatched in BV over a certain tolerance level, say, 10 - 15%, then that team's members gain additional XP (both Pilot XP and Mech XP) based on how outmatched they are. Perhaps not on a 1:1 ratio, but maybe a 1:2.
So if said match takes place and one team is 10% under the tolerance level for BV, they would gain 5% additional XP for their performance in the match. Let's face it, warfare usually isn't fair, but this way not only would you gain bragging rights should you win, but additionally, you'd take away a bigger chunk of experience as well.
I should say that the team with a higher BV wouldn't gain less XP - there's no point in punishing them for having more stuff than the other guys.
TL;DR - If you have less mech in the match, you gain more XP for doing your job.
Have at it, folks.
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