Difficult to not find some conflict of interest but as ever it seems anything British is strongly disliked with all kinds of rhetoric thrown in. I've come across this in F1 a lot on forums and by drivers like Rosberg. Nothing is mentioned if an Italian, Spaniard, Swiss, and French are the stewards or lets say the Spanish press are partisan or the coverage is supportive of Spanish drivers and attacking other drivers. Brits on the panel, hang on a minute, vague association with a British team, hang on.
What if an Italian steward has some connection with Ferrari, he can't be on the panel too or what if he rules in favour of an Italian driver and so on. It's quite a demanding role and Herbert has been doing it for a long time, I doubt the expertise and time demands go well with peoples lives and careers, and it would be very difficult to find a group for each race that is neutral with so many nationalities and multiple jobs people have had in the motor industry. No Dutch, no Austrians, No brits, no-one that has work or have an association with a company within the industry, where does it end?