I see nobody chimed in on how to fix cough syrup. I do not know first hand but let's throw out some ideas to toss around.
Honey, vanilla, fig, menthol or cool or koolada, chocolate or mocha, caramel. I have been told waffles or belgian waffles with
tobacco, I think that is in my Gold and it tones and sweetens the
tobacco.
If it is a big bottle, remember to separate a little out to play with. You don't want to ruin a whole bottle if you don't like it. I will do the 'mixing' right in my dripping atty. Two drops of the tobacco and one or two of the other flavor. Sometimes is wonderful, sometimes does not work, but it is only a few drops.
Maybe try another fruit to compliment the cherry like melon or peach or watermelon.
I hope someone who is good at this comes by and gives you some solid ideas. Let me know what you try. Good luck.