I think it'd be best to do 2 FRA servers, 1 NL, 1 GER.
German servers are of shit quality and besides this all would be a fuck fest between people bitching about servers, The French want the French servers and the Germans the German server etc..
Just make it that you have good French servers which are frequently reset so that no performance issues occur, in terms of the Dutch servers I suppose that is a middle ground never felt any major difference playing on those compared to the French ones