While I 100% agree with your assessment, I also don't think you'd get a three course meal at a signature restaurant for $55 either. I don't think the problem here is the price so much as the 'signature' terminology. This is not a signature dessert by any stretch of the imagination.
Totally true.
The price point does not allow for an elaborate dessert.
Heck, at most signatures, a steak alone will cost you $55.