As if I haven't written a weapon guide.
I'm having an excessively difficult time conceptualizing it, floundering in the analysis. I need to play LMGs myself to really test it out. Pretend killboxes don't exist because [I] can just say that they are bad in killboxes.
From my POV, if you were doing a flat cover vs enemy setup, then LMG seems good for 1. crowd control, 2. stagger, 3. good close range DPS, and 4. can still fire from range unlike CSG. Stagger enemies that come nearby, with the benefit of shooting from max range.
The DPS is nearly the same as AR at short range band and not far from HSMG. DPS tests like Francis John's comparison start from almost max range + don't account for crowd control. I assume that crowds are undesirable for LMG because it isn't strong enough??