Yoshi's own personal explanation for their reasoning in using a subscription payment model, increased content, hasn't yet materialized. I think that's a fair beef at least for now.
Actually there was an intrepid reporter who gave the Zam community an in depth commentary on Yoshi's personal explanation for his reasoning in using a subscription payment model about five months ago. Let's see...
Ah here it is. Written by someone named...
That's exactly what I was speaking about. From the link speaking on SWtoR...
If they were able to produce as much content as players wanted, then people would have stayed there. We don’t really believe it’s a problem with the business model.
Oh. I thought you were trying to say he hasn't provided an explanation for subscriptions at all which is nonsense as even you've commented on it. Those commas in your sentence seemed like a list. But I guess what you meant to say is that the content-paid-for-by-subscription-money is what is missing, not the explanation itself.
Sorry for the misunderstanding.
Although, I believe Yoshi has been forthcoming that his plan is to have a major content patch 4 times a year. It's too soon to judge if it's worth the wait and expense.