What exactly have they.... increased? I feel that if anything, they made it more problematic because the impression I got is that for 10 dollars this is all you can expect from Nintendo, and nothing more. Not even post-release support. That's kinda disappointing when we're talking about just 6 worlds of 4 short stages each. That's not increasing the average perceived worth of content, that's saying that they can't sell something for more than 10 dollars, and for 10 dollars don't expect much. People are not going to look at this as the content of SMR being what we deserve for 10 dollars, but rather that Nintendo is cheap and sucks at supporting their paid products on mobile.
On the other hand, if the base game is 10 bucks, and they continued to support it with content that increasingly trained people who enjoyed the game to understand how much they are expected to pay in exchange for quality ongoing support of content, that would be setting a value system that lasts.