Hello,
I'm French, so excuse me if I do any mistakes.
I'm currently discovering Construct2, which seems to be the best tool available today - I tried GameSalad and Stencyl too (which is promising).
I think it's a good idea to propose a "Free" edition, but in my opinion, each feature should be available in both edition, to be tried.
So I suggest you to make Families available in the Free edition, so we can all see if it suits our needs, but with some restrictions, as other features.
The restriction which makes more sense to me is to allow only 1 family to be created in the Free edition, just to be able to try it.
Thank you very much.