You need development tools for designers
True. Same goes for Canvas.
few companies have the manpower/skill to create a dynamic (animation-friendly) design/development environment targeted at web *designers*
This is true - there are some IDEs but they are mostly targeted to SVG in the mobile space. This is looking like it's starting to change though.
Canvas is a much simpler and smaller standard
True. Another way of saying this is "SVG is more powerful"
Browsers that integrate Canvas usually implement it in its entirety"
Nope, see Canvas text API or talk to the Bespin guys.