Grenadiers (240 MP) with MG42L are an exceptional overperforming unit. They outperform US-paras with L-MG with ease because of their veterancy and their rifle grenade. US-Paras pay 120 ammo for the upgrade, Grens 60ammo? They have regular shrek and rifle grenade - why do they need an LMG? I know Ost has no Ober but enough tank power, e.g. to counter infantry. They can also use PzGrens for ai purpose. The biggest problem is the deadly long range in combination with the rifle grenade.
Keep LMGs for doctrinals or at least increase the cost to 120 to equal US-Paras.