I hear you Dale - part of my original vision for Edit Room included vector shape editing (SVG) and image manipulation (Canvas) but there's only so much time in a day, and I've focused on getting the basics right first.

Any capabilities along those lines in a web app would probably be a bit more limited than desktop apps, but that doesn't mean that useful tools for vector and bitmap manipulation can't be made at all. However the case could be made to use desktop apps for what they're good for, and web layout apps can then reference files created with the desktop apps.