Forsaken and its large variety of end game activities by far. Current D2 is great and unfair to compare to for a number of reasons. Mostly because it's a shooter.
Everything they've done since the May update before Warmind dropped last year, increasing movement speed, reworking exotics to make them awesome, reworking the weapon loadouts and mods systems completely, reworking pvp (I still prefer 4v4 but the sandbox changes did wonders). Forsaken dropped and is better than taken king ever was.
And there's an undeniable amount of polish.
The real question is if you're the kind of gamer that just plays thru campaigns or is there to get into the high skill level end game activities and pvp. That's where the fun and commaredery is.
Want the real halo 5? Play destiny. Want to be iron man? Play anthem. I'll be dropping anthem completely the moment jokers wild content drops on March 11th but will return to it.
I never understood the complaint from the super hardcore about having nothing to do. Like... "hey buddy, you don't think the 200 hrs you invested into a game within 3 weeks isn't worth 60$???" You do know you can play other games in between content drops eh?