is KLM intercontinental somewhat accommodating?

I'd like to from anyone who has any real-world experience with KLM intercontinental to Europe.

We are flying KLM to/from Amsterdam this summer - their policy on nuts is basically: nuts everywhere.  

"On intercontinental flights, we serve a mixed nut snack in Business Class and almonds in Economy Class... We recommend asking your doctor or KLM Cares about whether you should be travelling." (from https://www.klm.com/travel/ca_en/prepare_for_travel/travel_planning/special_meals/index.htm#p1, emphasis added).  

Besides waving epipens, allergist letter and own foods through the airport, and wiping down all reachable surfaces around the kids, is there anything else we can/should do?  they suggest a medical clearance signed by doctor is necessary - can anyone attest whether it would do more help than harm?