After listening to the podcast, I also had to think about Monsoon's excellent question. I dug into my past reviews, and I've got a couple.Mugen Souls
is maybe more of a B game than a C+, but still, the changes that would have made it much better are not big ones. Making it so that you could rewatch tutorials would have helped, for example, and that seems like a tiny change. But more importantly, I think if they had just cut a thing or two from the gameplay systems, it could have been great. The characters had too many stats, and what they did was very unclear. And the system that you use so often to attempt to turn enemies into your peons was equally unclear, making it a constant guessing game. Thankfully, from what Neal said in his review of the sequel, they did add an in-game help menu, and they made the peon system more clear.
More recently, Borderlands 2
on Vita. Again, maybe more of a B than a C+... or maybe even a B even. But still, the controls are a mess, because they tried to incorporate all of the controls from the console, and you just don't have enough buttons on Vita. There are one or two things they could have cut, and that would have made all the difference in the world. You don't really need a "switch to the next weapon" button, for example, because you have the entire D-pad dedicated to weapon selection.
Aside from that, all of the games I could think of that were just not good would need more/bigger changes than you're asking about to become actually good. :)