As much as I am eager for new content, I'd like to see polish first with the new content and wrapping up whatever may not be finished.
Then probably follow up with bug fixing, then lastly content.
I'm quite impatient for this new river/mechanical overhaul that I've heard so much teased about, but unfinished content can accumulate and just lower the quality of the game in the long run. Besides, we still need coral reefs to be added, as I'm last aware of them being unfinished currently. Which is a shame.