Rexaar

The special dominator you get from events always come with the 1st and 2nd line as your main stat, and 3rd line as critical rate.
It cannot be recube or starforce. Also cannot be used during transfer hammer and transposing.

This is an intended feature. You get no instance loot if you are dead when the boss is killed.

They keys only directly drop from Gollux reward room now.
100% chance to drop just 1 fallen heart tree key when you defeat gollux at hell difficulty.
Lower difficulty Gollux has a lower chance of dropping.

No way to revert back to previous version other than destroying the weapon and starting again from zero.
You will lose all your current potential, bonus potential,, soul, scrolls, star force, bonus stat , set effect on the weapon if you really want to use the 17 star scroll. (Using the equipment trace to recover them will end up replacing the starforce count making your effort to use the 17-star scroll pointless)

The delay is there to give time for the server to save so item don't get lost permanently (99% of the time).

The description they used for this message is quite a bit lazy.