[pagelist], [subpages], [siblings] and [pagelist_ext] shortcodes
To show list of posts you can use List Category Posts plugin.
Shortcodes [pagelist], [subpages] and [siblings] accept the same parameters. The only difference is that [subpages] and [siblings] not accept
child_of parameter, because [subpages] shows subpages to the current page and [siblings] shows subpages to the parent page.
To create sitemap.xml you can use Google XML Sitemaps plugin.
No, there is no "more-link" feature in the plugin. Because "more-link":
When you changed the plugin's code you should also change the plugin's version to '100' (for example) to avoid updates, which could override and delete your code.