The amount of angst is quite noticeable, and I'm sure they will pay attention to it, but the direction they've chosen, while somewhat niche, is more than sustainable.
It's not about what it can't do, it's about what it does do, and they've overcome one roadblock to getting the billions of people on the internet to try it with a single button.
The things they have to worry about now are the worth, and the retention.
To be honest I'm not seeing the value yet, but it's very early still.
Once its established, and running well, then you can start asking for things, that's where the retention comes in.
Asking for things that are exceptionally convoluted now is just pointless.