Light Novel retailers never list stuff as completed/stalled/axed without the publisher telling them so. Otherwise, the volume 3 listing is for the manga adaptation. The Light Novel's third volume came out back in 2019.
Whether the Web Novel is ongoing doesn't really matter if the publisher dropped releasing the Light Novel.
I think a Goblin Slayer story focused on a goblin could work maybe.
John Gardner managed to make Grendel look like the good guy (and Beowulf the bad guy). We could see the story of one of the Goblins that didn't come out of his hole, or one of the Goblins whose whole family died to Goblin Slayer, but he managed to live, and he plans revenge.
Goblins themselves are being manipulated and used by the people controlling the board, the "gods". They're the ones who made the rule that Goblins can't reproduce without a human host.
I've always thought it'd be interesting to explore what would happen if a woman they saved gave birth to a Goblin, and then an orphanage decided to take the Goblin in from birth. Is the way they act in their genes, or is it a learned parental environment thing?
I do want this series. Having a goblin lead should be interesting, reincarnated human or no.