for me, MWLL being a mod, is a drawback.
the thing is, when a game gets released, the rules, the balance, is often set in stone and wont change dramaticaly.
it is like it is. you might not like the balance, but you follow the rules of the game and adapt.
MW2 was not perfect. for example the hitboxes of the arms were horrible. but people still played it like crazy
when a mod remakes a previosuly popular game, everyone feels obliged to moan and complain about
every aspect of the game. and as the mod team wants their mod to be popular and played by many.
they more often than not cater to the loud croud. which causes the rules to change alot during the making
of the mod.