Hello, I have knew the Synfig for a time, since the 0.something version, the one who have existed in 2010. I have never felt comfortable with the in canvas render, so, I have never used with deep enough the software. Now with the new engine I hope learn something about the functionality of synfig.
I like more to do traditional animation (frame-by-frame) than use tweening tools, but, unfortunately, I think the time consumption of the traditional is counter productive for a marketable product.
Oh Yes, I love to do storyboards: www.behance.net/gallery/31413935/Storyboards
And my animations and tests: youtube.com/user/jefincrazy/videos
Sorry for any grammatical error