Would a hint of vanilla compliment the flavor?
My last batch of pumpkin ale that I entered into an October competition had wayyyyy too much cinnamon and all-spice. I brewed it back in June, so I hoped it would mellow before the competition entry date in mid October. It may have mellowed a bit, but was still overpowering and unbalanced.
The day before I had to enter the competition, I added a capful of grocery store vanilla extract (to a tad under 5.0 gallons), and it SIGNIFICANTLY mellowed out the cinnamon/allspice while adding only a very subtle vanilla flavor. Adding that one variable luckily put everything back into relative balance instantly.
Scored a 35 and took 2nd place in the pumpkin ale category in the small competition (about 40 entires in 5 categories).
That will definitely help in short order if you think a subtle vanilla will fit with the Apple Mead.