An overcentralized meta isn't necessarily a bad thing and can often be a good thing, especially in a tournament setting.
Knowing what the most common threats are means that you can prepare specific and creative anti-meta answers for them without having to worry about gimping yourself against everything else.
The famous Pachirisu was an anti-meta choice that only worked because the VGC 2014 meta was so centralized around Amoonguss.
Pic somewhat related.