I'm pretty happy with where it is at, especially with a pandemic over Christmas. OK. I kinda hate the nautiloid, and lots of the up to the grove. But only because it took me ages to accept that if you have a Tav you have a Tav and you don't need to recreate your character to get the name or the voice you want and so run through the beginning again

They are listening to feedback, and making changes. Maybe not all the changes, but not everyone agrees anyway. There will be a lot of things held back for the final release, and I would expect most of early access to focus on mechanical find tuning, both the engine and the 5e flavour. Also AI. Some of the monster tactics have gotten sneaky. There is probably enough content to test that. There probably needs to be a bit of drip fed content to keep enough interest up to keep on testing. Then there is the 80:20 rule or more likely 90:10 the last 10 percent takes 90 percent of your resources.
All that said, I think they could release something complete in a year to 18 months. They might be able to release something by the end if this year, and they have picked up staff, but that sort of timeline might put unnecessary pressure on the team and leave things feeling rushed. But a lot of it will depend on choices about what to include and what to leave for later, both in terms of story and features.