Is the development slow, yeah, I'll give you that, remember, their team of 5 only has one programmer, and sure, I wish things came faster, but it's no where near abandoned, they have been adding things from the roadmap, we got tarpits (on the roadmap) hearth and home, cult of the wolf (frost caves) and now, their attention is on the mistlands, so far we know what the outside of the new dungeon will be, that we are getting a new bow, and crossbow, and there are a couple new mobs

And we'll see, some are speculating we may gets some new boats, so parts of the ocean update may be coming with mistlands.

It is slow going, mistlands is a long way off still, but the game is NOT abandoned, and I honestly feel like progress has sped up a lot since release, terraforming optimization took a late chunk of their time, but now that that's done, stuff is moving