For what it's worth, I've found moving to C3 has been a breath of fresh air. I am sure the convenience of being able to simply open the project on my lunch break at work in a browser will actually encourage me use it more.
I really liked C2. I like C3 more now I've taken the step.
Completely appreciate the economics for Scirra behind the subscription model too.
Psychologically, it may be an age related thing that was putting me off a subscription service (I'm probably older than most of the users). If, as The Mnk mentioned it was an annual release with a version upgrade cost, weirdly, I don't think that would bother me - but it's pretty much the same thing except you can keep using the older model if you wanted.