Minor wishes, maybe. Here's a great concept that TC might steal from DOpus: as-you -type selection with the colon key: The : key opens the Lister Search field in selection mode. In this mode, all files and folders that contain the entered search string are selected. For example, to quickly select all text files, press :.txt and then return. To cancel the selection press escape.
I did not know that! Way cool!
It is. DOpus has a few other keys that initiate these special modes, some of them to assist in executing commands, but TC already does those other things, and in general I prefer TC's command-line to the DOpus implementation. (See "Navigation by Keys" on page 71 in DOpus Reference Manual PDF).
As for file selection, TC has Alt+Num Plus, which selects all files with the same extension. This is often good enough, but using the DOPus way you can select files matching any string you type.