When ammo pickups were removed it removed a mechanic where you could pickup ammo from enemies to refill Wasp's magazine which in turn made it much more difficult to keep the damage buff which really is the Wasp's only means of dealing damage at higher MMR. It'd be nice if they could either add ammo pickups back specifically for Hive's Wasp gun or add a new mechanic for Wasp to refill her magazine instead of having to forfeit the damage buff whenever her magazine reaches 0.