No, all they have to do is leave the grinding how it is now or similar and give fair amounts of experience through quests.. I am sorry to hear that you have never seem a decent balance between the two.. because that is a false statement.
Give fair rewards, and make enjoyable quests while leaving the option to grind. If the experience is not worth the effort then there will need to be adjustments.
It would be different if I was referring to perfecting the balance between pvp and pve, there are always issues with both sharing the same selection of skills. Don't overcomplicate this.
