I think fusion rifles are far worse, but there's an easy way for Bungie to fix this. Just make it so you don't spawn with special ammo from the start of the game.
Fusion rifles require much more finesse than shotguns. With shotguns just around corners with no fears and the worst that can happen is a trade.
Anyone up for the Weekly Strike on Level 26 on X1? PM
I'll be home in 30-40 min. Can you wait?