Hmm, I've been re-thinking my approach to levelling. With the first (and so far only) character I leveled to v14 I was quite intent on getting to max level. However, I found that once I ran out of quests, leveling abilities became quite hard.

So, on my current playthrough I'm focusing on the abilities instead. For the first time, I'm actually using the "training" trait on weapons and gear a lot. Also, I put almost all skill points into active abilities, in the knowledge that there's easily enough points around to fill out the passives later. I continually put new abilities on the bar and rotate level IV morphs out. It's kind of fun, as my build is always quite sub-optimal. I die a lot actually!

Still, overall leveling has been decent so far. At V3 I'm one veteran level ahead of the curve.