CS Forms looks really promising with filtering working right out of the box. Elements like charts being able to be hooked in easily is something that other forms can’t touch.
I’ve worked with extending form plugins quite a lot with extra features. This looks to have a decent bulk of features ready 
Look forward to seeing how this progresses and how we can use custom code & integrate with a 3rd party APIs when the docs come out.
One quick question for email routing. if say you had email action(s) that you wanted to separate to different users can you use conditions to say if this form input == value use this email/redirect/etc action. Would be interesting to see how you handle actions with conditions. maybe that is another a feature request.
Hopefully its ok to put these in one post. Some feature requests for down the line
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Multi Choice Radio with (image / icon) - Who doesn’t like icon buttons on forms
Checkbox/button image/icons toggle - Also great for filter UI -
Multi Step Forms - (quite a big one) with Custom next & previous buttons validate on each step. (I guess structure similar to the slideshow component.)
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Multi Step Auto advance option - if only one interactive element that supports single click. e.g. radio/button types. Then auto advance to the next step.
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Form input conditionals - Make a conditionals system that works via JavaScript (it might also want to validate serverside also?). so you can select a condition of a form input quickly and display another input or hide one. On a multistep this might hide that step if its now empty due to conditions.