Edit: I forgot to mention the other important reason a light is bad for new players. Mission types. Lights tend to be independent. For new players, you want them sticking with the group.
Forget all the customisation arguments. Except for a very few options like Endo-steel, the average light costs about as much as an assault excluding weapons.
Some might say that people who support this have a vested interest in racking up kills of new players in the most lightly armoured mechs, since all kills count the same as do component destructions, no matter the size of mech. Don't give a new player a mech that needs the most skill to survive on the battlefield.
I do support the idea of a heavy or a medium. Preferably one with at least one of each hardpoint type. A standard engine for survivability. If you go hunchback, try to make it the SP, since the hump is the first target for everybody.
Edited by Voidsinger, 25 March 2013 - 07:15 PM.