No, that is all.

SE has been making money far longer, they also have more experience to say why this may or may not work or even be the optimal solution.

Sure they can make more money...in the short term, but if you go and watch some of the interviews with Yoshi-P, he mentions sticking with the subscription service as it is a long-term investment. Switching to cash shops and/or micro-transactions on top of a subscription service, will cause SE to lose a lot of trust in their fan-base. Something Yoshi-P was quite proud to have restored after the disappointment that was 1.0.

TL;DR: no