https://i.imgur.com/6Bnh0Wu.png
First, the guaranteed legendary weapon and armor and 1 set item are usually trash and will be extracted 99% of the time.
Secondly, completing the task does not give you extra exclusive battle points (which are not calculated into your weekly battle points cap).
The other events, no matter how unrewarding or tedious they were, at least they give you some exclusive battle points that can be exchanged for extra hilts. Who doesn’t like extra hilts. 
That is why I think the Shady Stock’s reward needs to be updated, that will give the same range of rewards as other limited events.
First, the guaranteed set item is useless. It would be better if it gives 5 wisps as a reward so the players can craft one desired set item instead of random set items.
Second, the legendary gear from the Shady Stock should guarantee 3 stats or multiple affixes, and probably an eternal gear in the mix.
If the 2nd suggestion can’t be implemented, fine, just make the daily tasks give extra battle points upon completion.