And I'm going to disagree. From what I've seen, the camera is greatly improved. When I first got the phone in late November I saw issues with the camera locking up and picture taking being very slow. After the updates this year, the camera seems vastly improved. I'm not sure it is up to the snappy speed on the S9 or current iPhones, but if slower it is just that it is the speed of flagships from a year or two ago -- hardly sluggish.
In terms of quality, obviously it is going to be a step back from current flagships -- the camera hardware is just not as good. Having said that, it still takes good looking pictures, particularly in better light.
Now, I'll admit, I don't use the camera in my Essential often -- though I did spend a session taking 20ish pictures with no issues (no lag, slowdowns, or bad pictures), since the February camera update, and in moderate to low light. I need to get out and play with the 360 camera again, see how it is working, but I haven't had that chance yet; as well as a further test of the camera in better light.
I'm not sure with those claiming they still have these major lag issues with their cameras, whether they have an issue with their hardware or if something is messed up with their software. With the amount of playing some did with the camera software initially, I do wonder if their issues now with the camera are a result of trying to optimize the camera when it was bad and, because of that, the updates not being applied properly. Anyway, I find the camera much improved since last year, and that it takes good pictures -- if not quite as good as other flagships.