Unfortunately because all our gear is shared inside the crucible and PvE there will always be a need to do at least some of both. This is also why destiny can't effectively balance one side of the game without breaking something on the other side. Imagine how much better destiny pvp could have been with dedicated crucible gear and dedicated pve gear, both unable to be used outside of their respective environment. I know they were trying to keep the whole "Build your own unique guardian to use in pve or pvp" but this is why they've been struggling with balancing issues since launch. This also why most exotics are limited to what they can do, with most simply activating a perk on your subclass for free. They can't add too many new exotic abilities without accidentally breaking the crucible.