No your not the only one to expect it. Not sure why folks bash on Atlas as if it's in some exclusive territory. Every Early Access game I ever played lost about 1/2 their playerbase after the first month. I'm not surprised nor fearful of what was expected to happen with Atlas. Pay any attention to EA games and they all go through the same thing, just like other EA games I expect major updates to bring back some with a drop a month after the major update.
Folks are clearly reacting way too quick to a game barely out of its first month of existence based on many threads created in this forum. Guess folks think content, fixes, etc. all can just be dumped all in one month's time. This nonsense about Atlas is going to die is so silly!