Just spent a couple weeks putting together a long form project in StoryMaps Cascade, thought I'd share some thoughts and feedback.
Thanks for such a great product!
Luke,
Thanks so much for that feedback! This is the first case where we've heard of someone downloading and customizing Cascade, so we truly appreciate you taking the time to let us know how things went (and great job on those stories!).
We are definitely aware of the restrictions sizing embedded content, and that is on our list to address for a future release. We also plan to provide more text formatting options like bullets and autoplay/sound settings on videos.
We don't allow <script> tags in story content because that is a security issue, but in your case you downloaded the source code and should be adding any JavaScript to the code files rather than via the editor.
Owen