An attempt to translate Goma speak:
"Ears" are likely elves.
"Dark ears" are likely dark elves or drow.
I thought the pretty lady would be Alide, but we already met her in the town. Maybe it's her sister?
I would be surprised if the dark man was Dreg. He didn't seem particularly dark before.
The ears, I mean elves, said the goblins were all corrupted and completely out of control so that trade is no longer an option. That is clearly not the case since they do trade with driders and drows and in fact it was an elf that was out of control. Something fishy is going on here. Also when they told you about goblins sacrificing people to the beast it was at least misleading. Goma seems to have offered herself to it multiple times and is ultimately fine. Since we have contradicting information and some evidence that the elves are the ones that are wrong, take everything you learned in the village with some skepticism. There is a chance killing the beast would be a bad thing.
As for what to do, well, there is a reward here for you, the "Special Lumpy rocks". See what those are and what you have to do to get them. Otherwise go to the audience, tell them what you want (help against Lumberer, ore) and what you can offer (heal, cure, vials, negotiating/trading on their behalf).
The goblins seem nice enough, so consider staying in the cave instead of the village. Also the blacksmith might join the goblin cave. He is a human if I remember right, not one of the pointy ears, so chances are he will get along with them. Once you made use of Alide's services and got the blacksmith out there might be no reason to go back there.