All nice and well, but still kind of tiptoeing around the issue what happens, if 25+ players in assault Mechs are in a matchup queue and you join in with a medium Mech. As only medium. Sounds like a recipe for either "epic" scouting performance (possibly in a Whitworth, haha) or you having won the role as "team mascot". Waiting to become run over. Same if you want to form up a team for a set tonnage before the match. I can already see people going emo/ballistic/egomaniac about how they insist piloting their 100-ton Mech. Even if that means the next man in the team has only a whooping 40 or 45 tons left to work with at maximum.
Aka: "
Screw you, hippy, I don't give a **** if you are 5 tons short, I'll pilot my Atlas and give a **** if you have issues with one useless medium nOOb Mech or another. I am an elite pilot in my uber Atlas and thus will stay in it. You will be ****ing useless anyway! **** off!" And the likes of that...
As I don't seriously expect PGI to implement an individual tonnage limit/allotment per Mech for each pilot (which could be a nice randomizing feature tho), occurences like this statement above are prone to happen. Makes one actually think of how randomized a matchmaking for PUG games might be a good idea for the game as a whole. Because stuff like the example above might definitely lead to a distinct lack of teamwork when "Mr.1337 Atlas" (see above) needs
any kind of help from a medium Mech on his team.

I would find it hilariously funny, if, after that comment in the example above, the medium pilot in the match straightaway refused to scout and told the Atlas pilot to do it himself, as he's so much better and not "useless" apparently. Oh the rage ensuing...