Happy Thanksgiving guys. Honestly, you have been successful for a couple years now. You have a product that makes money every single time you drop an extension. You tried to expand into other genres and generally enjoy yourselves, so there's no use feeling regret now, or whatever this is. At the end of the day, you are going to be just fine, because even if Valley doesn't do well, your original IP has plenty of fans to keep the lights on.
In regards to the original post, is there some redundancy? Is there some repetitiveness? Yeah, there is, and to some extent, it feels like you run out of treasure and surprises. But you know this. You've acknowledged it all along. So I don't know why this hurts your feelings now.
I think one of the criticisms you have had now for almost a year is that people do not understand what the point is, what the goal is. If it's the dungeon crawling, exploration, procedurally generated world, you have that and you are delivering to the folks that want that. As far as story, as far as feeling anything about the world, there isn't any of that. Every dungeon I crawl is marked by a number, and to this end, it does begin to feel like repeating yourself over and over. This has been going on long time. I don't know if you are waiting for an epiphany (you have said you are, but then again you have acknowledged for many months that this is expected). I'm not sure it matters, because you do have a game that you can sell, and it does offer plenty of content as it is right now.
Is it a great game? It's not even close to AI war. Even now, people continue to find surprises in AI war. Folks are continually challenged. Every game feels different. A constant stream of content keeps things fresh. I have played it for hundreds of hours. In regards to Valley, I have maybe 12 hours. Maybe. And I don't feel myself wanting to come back to it because it does feel like I'm repeating myself. I load up AI war with much more frequency. I think this is a sign.
If you want to cater to your current audience, you need to find a way to make the experience able to be affected by our own skill level. You need to have some level of intellectual challenge. You need to have some depth with the meta-game. All of these three things you just don't have right now.
I will certainly keep my eye on Valley, continue to bug test, continue to contribute and will play the finished product. I just don't know if it's even close to your original opus; it isn't for me. Personally speaking, have a little perspective; you have both been successful doing this, you have families, you have plenty of things going for you collectively, I think that Valley is very small compared to your life achievements in all categories.