'New from template' dialog's specification
Long-time users tend to keep a great deal of templates around. Inkscape allows to pick templates from a simple submenu which isn't flexible enough.
Implementing a Scribus-like New From Template (further as NFT) dialog with additional search capability would help keeping templates organized and easili accessible.
Types of templates
NFT dialog provides access to both static and dynamically created (procedural) templates. Static templates are simple SVG files. Dynamically created templates are scripts like Perfect-Bound Cover. See GUI mockup section below for GUI considerations.
Mockup of NFT dialog for static templates:
Mockup of NFT dialog for procedural templates: