Giving Bolt charge access to other subclasses is a really neat novelty, but the perk is competing with other perks with a more immediate payout, which can make rolling storm feel like it's not helping most of the time. The way I see it, there are 2 good options to solve this. 1: simply put it in the 3rd column on select archetypes of future weapons. I think it would do well there. Or 2: buff the perk. Make kills chain lightning to nearby enemies. Giving you 1 instance of a jolt chain any time you get a kill would give it some immediate crowd control, but wouldn't impede on perks that actually jolt because it wouldn't be able to apply it to tanky targets like voltshot and feedback.