I've got a few minutes to waste. Here's my thoughts on yesterday's twitch...
Main things...The Destiny grind returns for those that had everything. Oh boy, they have really turned up the grind for folks that haven't had to in awhile.
Marks....grind...you can only hold 200 at a time....and they are across all three characters now. Grind. Good news, you can earn more than 200 in a week...allowing you to grind more.
Weapons...your year 1 weapons will garbage for the most part now. So, collect new weapons then grind your way to leveling them up. Now you can combine guns to make a more powerful gun....which means more grinding.
Exotics....you don't have to earn them again, but your current ones are garbage. Again, let me introduce this mechanic called grinding. Cause that's what you're looking at for all your exotics again.
Bounties....Holy cow, keeping track of all available bounties is a job in itself. There's approx 2,000 bounties available. Hmmm, seems like to knock them all out you'd have to get your grind on.
Vault - more space. Great, I suppose. I've never really had a vault problem myself but I do have to clean up my gear on occasion. You don't need to keep every gun and armor piece.
I foresee a lot of grinding, which is what I enjoyed about the first year. I'm not crazy about re-do'ing exotics and ditching old weapons, but I'm ready to play it and see what's in store.
The grind is back for folks bored to tears in Destiny currently.
Also, if you're interested, here's a 3.5 min video of all the info in yesterday's hour long broadcast.
https://www.youtube.com/watch?v=xy-v0X1R1A4