Please stop making core/paper elements only single page web app style!
For example add support to have paper-tabs with real links, not just js-api selector.
I think polymer components would work beautifully with combined with Turbolinks [1]:
a. Page gets loaded, polymer components are loaded and parsed
b. New link is clicked, loaded via Turbolinks, body replaced, polymer components in app's head are not re-parsed, they are already there from previously.
It's a shame not to support the most common patterns of how the web works (ie. via links).