compair tooltip not showing nui6
 

installed nui6 last night.

but the shift mouseover on gear doesnt show the comparison tooltip

when disabling nui6 its back again

so far the unitframes looks nice and it feels a bit faster havent noticed anything strange with it yet.
( to answer ur overall question what this alpha was released for ;-D )

what i dont like that the hud is gone , the minimap is not in the center as nui5
and missing the castbars in my hud.

dont mind the buffs display being back to blizzard for the moment just the 3 things i mentioned are bugging me cause im so used to nui5.

What I usually do while testing nUI6 with some elements not available during testing is use one of the standalone addons that offer that facility.

I myself found I was missing the hud display and had to remind myself to keep looking down at the target frame to see how quickly the target was to dying rofl.