I will disagree with this. All this means is that the people playing now think the game is fine, that has nothing to do with the game having enough appeal for the player counts to grow. My point was that no matter what aspect of the game some players question needs to change, we always get a bunch of players that say everything is fine. If everything is fine and we have a great game, then where are the players? Why do they not stay?
The argument that making changes to a core mechanic would alienate existing players might be true, but if we loose 100 players but gain 1000 then I would argue it is worth it.
This is your personal experience and I respect that but I can come up with other players that just set items to craft and log out of the game and go play something else while they wait for things to craft. I do not think this is a good way to keep players playing your game. It is a great way to have players find other games where they like the experience more. Instead of mining/gathering/hunting for materials; then crafting them and immediately (or close to it) use what they crafted to build or hunt or mine some more, and as a result continue to play the game, they logout and do something else. This, I would argue, probably also contributes in a small way to the fact that the planets are more empty.