Hmm did 5 bounties on T1 with my DH quickly to check it out before I go to bed since I finished the game on my crusader, got 3levels. Probably can hit 70 off bounties in T1 in like an hour and a half or so? Pretty nice to get all my other chars to 70. Rerolled a few of my legendaries and gained like 60k DPS, most important was rerolling vit off my xbow into a socket then putting in a shitty trash marquise I got from random white mobs while leveling, bam 20%paperdoll DPS.
As for wether or not it's worth buying, it depends on how you feel about it. I just played 18hours in a row, so even assuming I didn't log tomorrow, that's still a good amount at that price, unless all you buy are stuff on sales, but then everything that releases isn't worth it because it'll be cheaper later so that's a moot point. You might not get 18hours out of the game yourself though, if you rush through the story on a fairly well geared lvl 60 and that's it, then yeah it's not worth it, there just isn't that much new content. If you level the new class/a new character and actually do random events, clear the maps, play on a decent difficulty so the game is challenging at your gear level then farm for a few days, then 40bucks is worth it.