In its current state the M249 just feels like a weaker assault rifle with higher magazine capacity, it doesn't really have any advantage over the Val, Vector, or P90 overall.
Snipers and people using faster ttk guns can just ignore your hail of bullets because they have the same or less recoil, and can kill you faster than you can kill them.
The bipod, which should be the attachment of choice for suppressive fire, is basically useless for it, spraying with the M249 bipod is still wildly uncontrollable, with the added bonus of forcing you to shoot from a bad position (center of a window, or prone out in the open). While a basic grip has comparable recoil and lets you shoot while on the move.
At worst, give the gun some better stats, let it contest assault rifles at range, support is already slower and less maneuverable, let that be the advantage other guns have over it.
At best, give us some battlefield 1 style suppression, make it harder for people to aim when their cover is getting suppressed by 3 M249's and throw some assist points their way when teammates take advantage of it.
