Tara....I am not a Reflections owner, but my husband and I just went through a trade-in: our 2013 TT for a 5ver.
First, allow me to say that the dealers are not going to lose money.
You got a great trade-in, but I am thinking the price for the new one may be on the high side. If you got them to lower the price on the new model by a few thousand dollars, I am willing to bet that your trade-in would not be as high.
In my situation, I put an offer on the 5ver, which was a few thousand less than what was listed. Soooo, our TT trade-in allowance was about $5,000 less than we paid for new.
Dealerships have their bottom line price. Since the salesperson already made an offer on your trade, I would see if I could get a lower price on the new model and see what happens. IMO, it is worth a try.