>The Families system has involved one of the biggest overhauls of the Construct 2 codebase since the project started.
>It is also missing some further features we hope to be adding in the next few releases: Family Variables and Family Behaviors.
>We also expect it to take another few releases after that for all the issues to be ironed out and have everything working robustly and smoothly.
> So if you have important projects, you may want to hold off using Families until the feature has matured.
>We hope it won't be long! On the other hand, if you can't wait, give them a spin and let us know if you have any problems!

まだだよ、ビヘイビアもそのうち付けるって・・・
だからまだ本格的なプロジェクトには組み込まないでー的な事が書いてあると思う。