Yes, and there does need to be some adjustments for real time play, but those limitations weren't included in MW4 which was what allowed the mechs that were too powerful.
If MWLL follows the same space, heat and even ammo limitation ideas they could even go further with the weapons for their intended purpose. Increase the AC20 damage but lower the ammo back down again. If you want to fire it a lot make it thirsty and require tons of ammo to be devoted to it. Changing a ton of UAC20 ammo to 25 shots from 5 just because it fires faster means ammo no longer is a limitation for that gun, while the LBX20 is starving for ammo, and the Bushwacker with the LBX 20 has no free tonnage while the UAC20 Scat doesn't need extra because it comes with 25 shots...