After talking a break from Destiny I started playing FFXIV. That game lets to change everything position, size, colour and in some cases design. Moving that stuff about was a bit clunky on console but once you had it how you liked it it was worth the effort.
Destiny could definitely do with HUD customisation opinion. I feel the buff/debuff is a bit cluttered, you could have a few weapons buffs going, then buffs from fireteam, then on top of that you also have to look for raid buff in the same place.
I would change that if I had the option separate them or colour code them, personal, fireteam, mechanic.