Yup. Spindle was found in what, 2-3 hours max? The ghost was stumbled upon accidentally in the VoG quest? I mean....it's not a real mystery once it happens. Sure there's the mysteries of the one person with the Twilight Gap chest piece, but everything is revealed pretty fast. If Bungie really wanted to make a mystery that takes intelligence to solve, they would be putting clues into grimoire cards, making very very hidden objects in the world, maybe even adding timed things that only happen on certain times of the day. Small things like above, jumping through hoops in a certain order. Make it obfuscated, make it dense, don't be afraid to have this extremely hard 'fuck you' to the community that won't be completed by everyone even when they know the answer.