Orwell and writing rules

This is a BBC article where Orwell is considered as a Mediocrity, for the purpose of triggering the reader's attention, which worked perfectly with me.

Why Orwell was a literary mediocrity

Orwell, most known for his didactic novels "Animal Farm" and "1984", was a bulwark against totalitarian ideologies.
Orwell is extremely effective when translated.
His writing style makes him the most translated English author of the XXth century. Of course he's English, but any literary creation requires a specific cultural foundation. To consider him a mediocrity for the sake of cultural diversity is far-fetched and totally false because his rules for writing are not normative but, rather, set conditions for the effective translatability of the works.