While at max level yes you will never spend it on anything but heat blast and auto crossbow, do keep in mind it’s easy to forget that hypercharge is actually a CD with its own effects.

You obtain hypercharge at level 30 and it increases your weaponskill potencies. You don’t get heat blast until 35 and auto crossbow doesn’t come until 52. This change may help at max level but for the levelling process it would be a nerf to both single target level 30-34 and AoE from 30-52.