Anyone who is a mild pvp player can aquire skills for heros for free, (no gold) in pve. Simply unlock the skill that you desire with faction points, which are relitivly easy to aquire, especially after this weekened,
and you can equip them on you hero for any character! (they will not be available to your character hovever). The most useful thing this is for is getting elites for your hero for a class that you have never played before, such as the sin hero that I have no skills for but want a good build without having to cap the elite. On a side note those skills will be available now at any skill trainer in the world, (as long as your campaign supports those skills.) So you want to have meteor shower right after pre-searing, no problem have it unlocked through faction and then u can buy it at the Ascalon skill trainer.
again this is not for everyone just those who are like 75% pve and 25% pvp and have some unspent faction points.
hope this help!