One of the issues that's arisen as a need is better support for some of the win32 specific window handling. Currently Watir has multiple methods of enumerating windows - calling to Win32OLE shell and iterating through by title as opposed to class which is causing some users issues (WTR-76) and through winClicker.rb. WET has several libraries which can be incorporated into Watir for their OO goodness and stability. It's important to keep the current libraries, given that many users are currently incorporating them into their scripts, however, it would be nice to deprecate them over time.