i tried what i suggested, and it works to me.
you can eventually change {.get|url|tpl=list.} with ?tpl=list
the first form is actually translated by the server itself, but the second should always work.
here is an example
$('body').load('?tpl=list')
in HFS 3 i already made a default template where you change folder without reloading the page.
They are not compatible, anyway, but you may eventually get inspiration.