Aside from the poison resist, there is literally 0 difference in dmg between edl and this offhand.
People have figured out by now that they are better than edl OH on BT. Plus i think t8 is better than edl as it also has a skill.
There is no skill when you look at it in the upgrade npc unless it's supposed to not be seen. But damage wise, edl and bt OH are identical. The only thing that separates them is poison resistence.
In the vendor u can only see t7. T8 is obtainable using the last echo that drops from BT its self.
T8 skill is also better.
Let’s take rogue’s offhand for example. If i can recall correctly, it does double the damage of edl spite, but for half of the duration. That sounds useless right? Well it isn’t. When having multiple rogues with those offhands, they can recast spite every 15 seconds which would deal a huge amount of damage.
That’s for the spite. As for other stats, new offhands has critical abilities, and it gives a direct boost to quick strike or shadowstrike. So i would say they are actually an upgrade from EDL oh