If the yeast are having trouble with the complex sugars now, they will be having a really hard time once they get another taste of simple sugars. You might want to try getting a started going with some fresh yeast and then pitch in a couple days. This will help to fortify the new yeast to finish off some more of the remaining fermentables. However, adding some honey will help to dry it out a little more and add some complexity to the finished product as well. I've had success adding as much as a pound of honey directly into the fermenter without any treatment.