Good point, though removing an incentive to play (Arguably 10 AP is less of an incentive but it's still there for many.) is still removing an incentive. I generally see people who do dailies every day, or those that are more like "Meh I'm not interested in AP, but I'll do dailies when I have nothing else to do." In which case I see the cap as only hurting the group that was passionate about AP hunting in the first place. Arguably they have it set up so that after pinnacle skins the rewards still continue, just with no skins. But without daily AP it's slowed to a crawl on progression.