I have created Plunkers to demonstrate several issues.

First, selectors don't work correctly. My components use g.some-class as selector and those don't match anymore against a <g class="some-class">. When it's just a class selector .some-class it matches correctly. Fixed in 2.0.0-alpha.53

Second, when the selector doesn't work and there is a data binding defined, the error message is an InvalidCharacterError, because the parser tries to instantiate an @svg:g element with createElement to find the unknown property there. (Fixed in 2.0.0-alpha.49)

Third, even when everything is setup correctly and the component is instantiated, the actual child component's SVG isn't rendered (tested in Firefox, Chrome and Edge). There should be a black circle covering the red circle in the Plunker, it's there in the DOM, but wouldn't render. Fixed with a svg: prefix in the template