SO.

1). Quick Gather DOES save lots of time. That 1 second or so that the game pauses before it registers your click is quite noticeable.
2). The Auto-Sneak is just so good. You aren't slowed by sneaking anymore and it's always up. HOWEVER, if you change to DoL while in town your Sneak will NOT be up. Don't forget about this if you go out after changing while in town.
3). As far as I can tell, the crystal yield skill does exactly the same thing as it used to, only there's 1 button that works on all crystals and shards.
4). They appear to have somewhat boosted XP gains, I was just gathering materials for my crafting binge and I gained a level or two on my 70+ gatherers today quite easily. Or at least it felt that way.

Otherwise, it seems to be pretty much the same as it always was.