So Lloth is after dragon shards? Kobold union is also after dragonshards? When the world is gonna be destroyed, nothing is coincidence. Lloth started the Kobold union (she's chaotic, it doesn't have to make sense... or Does it?) She did not do this from the kindness of her heart. She IS infact a kobold. Druids coming out at the same time as Lloth a coincidence? Never, she is infact a Kobold Druid!
She isn't just any druid, but an ultimate archdruid of chaotic awesomeness, who's natural place is the Underdark. She started life as a Kobold fashion designer (she is credited with pairing spider monkeys with street performers), but after being ousted from her company by Yalthoon, she decided to go a different route in life. A more vengeful route... because as we all know, Kobolds never forget.
Yalthoon is infact the real reason she is coming. She has even tried before. She wove a web of dreams to ensnare ebberon before, but the stormreaver foiled her plans and sealed her away in the plane of dreams. There she had to remain disguised as the devourer of dreams in order to bid her time and eventually escape. (this is why the devourer survived where the rest of the dreaming heart did not) Eventually she lured unsuspecting adventurers into her prison to destroy her manifestation and allow her another go at things.
She learned much while she was there though. She is not even all that interested in the material plane. She wishes to, instead choke Xoriat (yalthoon's home town) in webs. She needs the dragonshards for an elaborate ritual designed to anchor the webs to the more stable material plane.
We should in fact be helping her, as it would benefit the mortal plane greatly to be finally rid of Xoriat.
Now this is all just speculation, but I'm sure if you all examine the facts, you will see that everything I said is true.
PS: in addition to being head boss of the Kobold union, being an arch-druid, she also leads the Gatekeepers