I love PvE only skills, however, I have to say that with the introduction of GW:EN and 50 new PvE only skills, plus the existing ones, this will lead to very, very powerful builds... some already exist, like that Paragon build that owned Mallyx with 3 PvE-only skills. I think a good idea would be if you can only use skills from one title at a time, whichever you have equipped. This would prevent hardcore PvE-only bars from making the game a complete joke, as some fear it will do, and still allow people who like using the skills to have them... really, I can't see any situation (except perhaps the DoA) where you will need an abundance of PvE only skills. Essentially, a change like this would make your title into almost a "Third Profession", for example, "I'm a Necro/Monk Lightbringer", which would mean that he can use necro skills, monk skills, AND lightbringer skills. As if titles became a third exclusive PvE profession.
Oh well, just thought it would be a fun and interesting change