I wanted to give you some more details about the incoming patch:
1) Because of the new weight system, there will be no logic in having torsos determine how much items you can carry from every type. Equipment slots will be unlocked by leveling up (All equipment slots will already be unlocked for experienced players).
2) In level 10 players will get two more mech slots, so you will be able to choose which mech you want to battle with. 2v2 and 3v3 will come in a later patch.
3) These features can already be tested in:http://www.supermechs.com/bmmdev/
Please note that the development site gets restarted frequently.