This is pretty much what they’ve been doing since Forgotten Gods released back in March 2019. As Zantai said in the latest GM, the game had 8 patches last year; 3 of them major ones.
GD isn’t like PoE, it’s not an always online game that needs refreshing. The game is big enough now; any more will just make it feel bloated and that’s not something Crate want. Also the team have been doing this since 2012 and want a break from the ARPG genre for a while. They won’t get that if they’re still continuing to add stuff to the game. They want to try out other ideas; we know Zantai’s working on a GD related project, but there are others we know nothing about yet. Crate haven’t ruled out maybe adding to GD at some point in the future, but it certainly wouldn’t be on a regular basis like you suggest. That bird has flown now.
If you feel like the vanilla game is getting a bit stale then try one of several mods for the game; some add new masteries to play with, others have completely new maps, etc.