If the aTV were a computer, with multiple different possible configurations, I'd be inclined to agree with you. But, the aTV is a completely closed platform with only 2 variations relative to capacity. Given this, I find any problems indicative of manufacturing or software problems, and therefore quite troubling.
What's more, though, is the inability to go back a version. With a computer OS, even with something as closed as the iPod Touch/iPhone, one can always go back to the last version that worked, even though if usually means reinstalling the OS and updating to the preferred version. With the aTV, however, there is no way to go back to a preferred version; you've only got factory restore or current version.
Therefore, I think the decision to update needs to be taken with greater consideration than usual, particularly in light of all the bugs in the previous two versions. For example, I haven't seen anyone yet claim that 2.0.2 has resolved the very common "aTV disappearing from iTunes Devices list" bug.
