A wealth of new content will be coming to Diablo III: Reaper of Souls, and the team behind the game are currently looking for player feedback in order to guide their testing efforts. If you have any thoughts, head to the relevant thread here, and have a look at what the guidelines are that Blizzard require.
The feedback will be based around 4-Man Group Play as part of Patch 2.6.1, an update that will be bringing changes to class sets, items and skills. If you are looking to leave feedback, then there’s a few baseline questions that Blizzard would like to see answered. These include what class do you play, and what build are you using? Players are also encouraged to use sites such as D3Planner to provide a link to builds, whilst also stating what other classes they are using. It would also be helpful if players could describe the other builds that they are playing with.
Further information required includes what level Nephalem/Greater Rift has been completed, if there have been any bugs, glitches or unusual interactions, or if there was a monster or area that was key to causing any issues. Finally, feel free to leave any additional comments that might help make these improvements.
In closing, Blizzard has reiterated that players must make sure they post in the relevant thread to avoid it being deleted.