That's a fair point. A CD reduction however would also prohibit excessive use. Question though: Do you think then that the current barrage is underpriced?
No I don't think its underpriced. For a cheaper munition cost other factions get access to grenade able to simply wipe a full healed squad. Zis barrage isn't likely to do so but it compensated with a longer range. Imo the barrage on itself is balanced, problem comes when you add a second Zis gun or in team game when multiple players are Soviet.
What make it prevalent is the need and low risk atm to build 2 atguns. I think its more a problem of game economy and popcap than Zis Barrage.
That a consequence of balance team's previous decision to make atgun more prevalent coming from the push given to medium tanks that are more reliable and less countered by TDs along side with this idea during many previous patches to constantly reduce units popcap and manpower cost leading players into litterally flotting in manpower and increasing army size.
I mean if the solution to that is to nerf the Zis barrage to the point where players will overcome it by building two of them, that's imo a really bad solution that only enable previous bad decision making.