I noticed on Sifu Redmond's (Traditional Wing Chun, student of Grandmaster Cheung) Youtube site that a Gwai Ma (Kneeling Stance) has been officially added to the form, although he doesn't say which one. Apparently, it was included originally but was taken out - now it's been 'added' back in.
I have independantly, included a kneeling stance pheonix eye attack in my Bil Jee set for some months now as I remember reading that Ip Man used such a defence to win a fight when an opponent swept his lead leg, so how did Ip Man respond so swiftly had he not trained it?

Also Sifu Robert Chu is shown in such a kneeling stance in the book Complete Wing Chun, and he studied in Gu Lao village (Leung Jan's 40 point Wing Chun).



There is a similar move in Monkey Kung Fu and Ngo Cho Kun.

Anyway, if Wing Chun was developed as a condensed, better version of various Kung Fu styles, or to deal with various styles, the founder(s) did not fully allow for Wrestlers / Groundwork.

What else has been taken out by others, or kept for closed-door students?