First congrats to the Corona team for this great next step and all the effort in try to make it as affordable as possible, yes you will never make everybody happy, it is just the size of the beast really.
I am already in Adobe CC and soon I'll need to start with Autodesk rental, yes some people does not like it, but for my freelancing it works. The Saas option is not strange to me and I feel is the option that I will take.
With all that said, I think the only problem (if we can call it that way) with the Box model, is the "feel" of lack of support, I know that Corona team didn't meant to do this, but invest in a software and know that after pay you are in your own, it feel not right. I do understand the points, but I also think that maybe because of the difference type of approach SaaS and box, maybe they can just not coexist together in a product. Maybe this is why Adobe cut everything and just keep CC, and that's why Autodesk is cancelling the updates and moving to a rental style. Maybe the only way to make everybody happy would be a Box model, with constant updates and areate at the moment of a next realease, this would be weird because at the same time you have a very generous Saas model, and the developers will have to bite the bullet to make everybody happy? think about it
Regarding renders nodes, free is always good, but I think that 3 render nodes is very generous, VRay give you one, Cinema 4D give you 3 and so on. More render nodes I would not call it Hobby, come on guys be honest, there is a lot of work developing a software, let us not abuse, this team is generous enough in spend all this time to make most of us happy, they need to make a living, or at least get paid for all the time invested in this software.
and since I am ready the corona Blog always it mentioned a free version for Hobby or people that can't pay no need to complain so much.
my two cents, or equivalent currency :p