If they can survive the cuts then I definitely have hope. I liked Dart enough to be happy with using it; I like the Flutter ecosystem in general as well. It'll be interesting times in app development if they can make a better cross-platform solution than currently exists.
The HTML renderer is actually what was first, canvas came later. The canvas is the first class implementation while the HTML one is a fallback for mobile performance and I assume if canvas is fast enough, HTML will be dropped as well.