Yea Wyeast sweet mead is a "fun" yeast. I don't know what yeast nutrients you used but if it was only DAP "probably one of the most common of yeast nutrients" Then that may be part of the cause here. You need more natural nitrates/proteans like yeast hulls and B vitamins to help this yeast truck along. Sounds like they starved out and are done. Make a nice starter of the D47 like such and you will be fine:
2 cups warm water
1/4 cup honey
1/4 tsp of yeast nutrients
5 fine chopped raisins
Sprinkle the yeast on top and cover with paper towel. Every 2 hours add 1/2 cup of must until you have just over 4 cups of volume total. You should see plenty of fermentation at the first must addition and it should continue for the whole 8 hour ordeal. Pitch that and you should dry out the mead.
A painting says a thousand words. But a painting while on good mead just looks funny!