Some additional thoughts, having just finished the game:
I really liked the concept of exploring this distant planet via time delay and waiting to see what the pictures would look like, but the illusion was spoiled somewhat by the sheer number of living things out there. After you've left the starting area, you know you're going to see dozens of funky plants in every single shot - the place is far too fertile to be even remotely plausible. There's no thrill of the hunt, and after a while I didn't bother tagging a lot of stuff because it all looked the same.
It could have been more creepy. For example, you've taken half a dozen shots of rocks and sand, then suddenly you get one with something blurring past the camera. Instead it's very colourful and 'safe'. Lost your rover? Don't worry, we've got a limitless supply of them.
The analysis of the species didn't seem like the kind of thing a scientist would write. The names were a bit incongruous, too. Also, how could somebody produce a full colour sketch of a typical specimen from a single shot taken at night?
I would gladly have paid to reduce the waiting period, but by the time I was getting fed up of spending four hours between moves I assumed I was pretty much at the end. I wasn't, though. If it had been clear that there was more to do, I would have paid.
About the number of living things, why wouldn't there be? If you drop a rover on a random patch of earth, you're standing a pretty good chance to encounter a lot of species. The only exceptions on this are deserts and mountain ranges, of which the later still harbors a good amount of life. And sure, there could have been a bit more diversity, but remember that most of earths diversity is in its, seas, insects and microorganisms, all of which are not find able with the current rovers.
I do agree it could use a bit more danger, let rovers be attacked by razorbacks, I say, but that would require a lot more programming work, and even more of a supply of rovers. What fun would it be if you lost your rover and be locked out of the game as a result. Perhaps a small delay in activating the new rover would be good, as to let it calibrate itself. And remember, according to the story, you are on of the better rover drivers out there, it makes sense that they would want you to keep on working.
As for the descriptions, perhaps those are not the full scientific write-ups, but more something for the drivers, wouldn't want to bore you with dry, be it made-up, facts. And for the sketches, that something of a fun vs. immersion thing, and they chose for fun on this aspect.