I hate to say this but I think that you misunderstand what they do there.
it's not Top Chef. A true chef can make you anything but this is not where a chef creates food JUST for you. There is an entire restaurant they are catering to. Allergies they accomidate but a list of ALL the food you don't like...to me that seems a little too much. Most chefs don't like substitutions such are take off this, this, this and that because it's altering the entire flavor profile and what you are served might not taste as good. They will do it for you but trust me they are not happy about it. My BIL is a chef and we have spoken about this a lot. My argument has always been if I am paying I should get it the way I want it, his is when you alter it you are not getting his best and he refuses to send anything out that isn't his best. I guess I can see both sides of that argument.
I just can't imagine spending that much money and then ordering really plain food.
Unless you are allergic I would say TRY what they serve. You might be pleasantly surprised, these chefs are masters at delicious.