Humiliation is voluntary as well, I got some 'feedback' from followers that they didn't like it in 0.9 and 1.0. So in Futa Grandma 2 that also will be optional because some felt that was going into Netorare territory and they didn't like an MC that was somewhat powerless.
The idea always was the family and no-one else, he doesn't know Stilyo has you know what so he doesn't mind girl on girl and that his grandma and mum would train him to be a better man, grandma with the mental stuff and mum with the physical.
And to be fair considering what he'll be like in the end...
I think it's a fair deal and fair to say they succeeded.