You dont need an exploit to defeat Crota but I agree. Bungie has never understood the line between difficult and tedious. Halo's Legendary difficulty is a prime example of that.

See, the thing about Legendary difficulty in Halo was that it was optional. If you really wanted to challenge/torture yourself, you could go for it. In Destiny it's a lot less optional. If you want to get the good stuff and upgrade it at anything resembling a decent rate you have to be doing the hardest weekly strikes, nightfall, Raid, etc. If that's how they're going to roll, it'd be nice to see something better from them in the boss fight department. Every Nightfall strike I've been on, I learn a new exploit and frankly, they're the only way I can see to win those fights.