There exists a hook which allows to render a preview of extension, but noone use it. This has to change!
There are some tiny features that might be hidden. Let's have a look to 2 tiny but very useful treasures ;)
Easy way to customize your pages with own icons
There is a big change in version 4.3 with the "New Content Element Wizard", it is now configured by pageTS. This allows to have specifiv page-per-page-configurations. This article shows you the technique behind.
A tutorial on how to integrate and render own Content Element in TYPO3