Does something like that exist (or is part of one of the big mods) or is in development in the aftermath of the 2015 x-mas special?

Somebody have to add the legs gesture to the model directly and if you are using a model with new animations you will lose them It also have to be done to all models with Monica's body you'll want to use.
I hope someone will be able to put all the new animations together but I know some source models have already been lost so their animations will have to be redone.