Aye, to the mate above me (cause I have no idea how to work quotes lol), who are the ones in charge of actually updating the game? The developers. Who are the ones in charge of choosing to keep updating the game, regardless of outside forces? The developers. Re-Logic can choose to work on Terraria 2 whenever they want, Terraria is already a finished game, it's just that Re-Logic can't help themselves and want to keep adding to it.
I get what you're saying, but suggestions for Terraria will never stop. As long as it has a community, suggestions for changes to be made to the game will always come. It is up to Re-Logic themselves to decide when to stop working on the game. Heck, remember when Journey's End was supposed to be the final one? Re-Logic made statements over and over that they're gonna be working on other projects when that happened, and then a year and a half later, blam, suddenly teasers for Labor of Love started cropping up.
I'm sorry if I come off as rude or anything, it just feels wrong to me, to say that the fans are to blame for the developers making another update for Terraria when the developers themselves have repeatedly stated that they can't stop themselves from working on Terraria. I don't have direct proof and if I am wrong, feel free to say so, I am just conversating.