What's the worst thing that Bungie should fix from year 2 so far?

To me, I think the Taken King was a home run. There's not much I would change, the only thing personally I get frustrated with is the fact that a Nerwin's Mercy can two shot me from across the map (and thru walls) and that it takes 6 man raid teams hours upon hours to do raids. As a mainly solo player, I feel I am always being left behind, and by the time I actually get a team together, everyone is doing hard raids and not interested in helping a noob lol. Other that those little gripes, Destiny still get's an A+ in my book. Leave your feedback and let me know what you think!