We got Diablo 3.5 on launch. The game needs considerable updates before it is better than "good".
This is not a new game it is way too similar to Diablo 3. Itemization is just "green is good, red is bad" aka "big number good, small number bad". The legendary powers being "unlocked" upon dungeons is bad. They are taking feedback and I assume the game will be better in 6-12 months.
If you played Diablo 2 and liked it please play D2:R.
If you like Diablo 3, buy this game and play it.