That's pretty accurat. There is however another quest in the swamps, that you can only do before going off to free Halsin and attacking the goblins, it's tied to another storyline in the grove, which I put in spoilers.
It's about finding out, that Kagha works with shadow druids. You find a note in her personal chest behind a bookcase in on of the sleeping chambers in the druid grove - not the one with Nettie, the other one. If you follow that lead, you will find proof that Kagha is planning to take over for the shadow druids in the swamp and then you can confront her and the shadow druids. There are different ways, how this might end
Other than that, you have a lot to do still in your playthrough.
