Hark back to the days of Halo 3, where we had the splazer double kill achievement and a lot of the DLC achievements were garbage (to the point where many almost had to be boosted)

At least 80% of these are easily obtainable via normal play. Yes, I agree that any achievement that has you play in a specific way isn't a great one, but these could have been so much worse.

I'm wondering more about the speed-running achievements - is it in 1 go or is the achievement going to only take my best times into consideration? Do skulls negate the achievement? etc. etc.