Bland will NOT be your problem.
However, you have to understand that a lot of the US really doesn't deal well with food that isn't bland--a holdover from WWII rationing and canned foods, probably. IIRC, McDonalds(?) went through a huge engineering process to attempt to add an ingredient to their pipeline. They found that adding cucumber was fine, but avocado was a step too far for the midwest.
That's something I'd love to read in more details about. Personally, I'd say avocado is a step too far in anything that isn't fruit salad. But so is (pickled) cucumber. I wish they'd remove it from their burgers altogether. The reasoning is, pickled cucumber overwhelms everything else with its sour flavor. McD burgers I experienced (in several countries, Europe and Asia) have a balanced composition of tastes, and that slice of cucumber there is as if someone threw a grenade into it. I usually hunt it down and eat it with my first bite, so that I can enjoy the rest of the burger in peace.
I think that heavily depends on where your circle is eating at in both places.