I didn't play the Halo 5 beta, but how did the Hydra compare to Reach's plasma launcher? It seemed to be meant to attack infantry, and the projectiles moved faster? Did it require a charge?
Hydra required a zoom plus a second or two to lock on an enemy. Plasma launcher was instantaneous lock on. Plasma launcher projectiles are much slower and required hold to charge. Hydra are much faster and can curve heavily around objects to cross-map. You can shoot as many as the clip had. Hydra and plasma launcher can fire without lock on but both are far less effective.