That Reddit post from earlier is pretty interesting.
I don't see Activision totally dropping DLC but due to being absolutely panned and lower DLC sales(?) than they hoped, I could see them lowering the price of DLC and then supplementing this with paid for customisation items such as gun skins/ghost skins or designs/speeder skins etc. (look at activisions other games such as CoD, WoW for example.)
There's a market there for those items which have a massive profit margin.
As for the other points, I'd like to see all of them happen.
I'm surprised to see that there was a letter for advice on Destiny from Blizzard, they said not to have trading/Auction House. I wonder if Blizz regret having an trading/AH in WoW.
What really surprises me though is that considering Activision have the biggest most experienced MMO developer under them, that they've not had Blizzard involved in Destiny, working alongside Bungie.
Obviously Bungie and Blizzard are their own establishments, and Bungie is proud to do their own games with their own goals etc but a small team of guys from Blizz bringing over some things that they learned from developing WoW would do Bungie a whole lot of good and stop them making mistakes that Blizzard did.