Yes! I would totally use that all the time
I guess that could be pretty helpful
Nope, wouldn’t ever use it
I'd recommend looking into apps or other options that have this feature. I use Destiny Item Manager to create loadouts and with 1 button it auto equips everything to that character where it may be. I know the common response will be "why isnt it in the game i dont want to go to an app" but you have to realise Bungie invested time, effort and resources into making an insanely good API so that people can even make these websites and apps in the first place. Without this API we wouldnt amazing websites like DIM or Braytech or Raid.report or whatever it may be and I think thats fine. They gave us the tools to make what we want and now we get to reap the benefits of that, and they dont have to waste time making extra features that already exist elsewhere.
I've lobbied for this recently as well. I believe it should be in the actual game and we should be able to insta-change based on the activity.