We wrote down the documentation how to expand new rich text editor, which is implemented in Movable Type 5.2, on our developer's wiki. In this document, we also describe how to implement table function into editor using the plugin.
Please refer to the documentation and try out our new Movable Type 5.2 beta !
"The expansion of Movable Type's Rich Text Editor"
Movable Type 5.2 Beta
Attention: TableFeatureForTinyMCE is an experimental fucntion, and we do not provide an official support. Please understand before you try it.