The question is whether you have enough cash to do that. With my savings rate, that would be pretty... stupid and much less profitable than putting that amount into an AllWorld.
If I invest 1000,- each in the respective companies at the start and then run further savings plans on them, there should actually be more return than what the ETF gives me.
@Steewee How many companies are we talking about here? The top 10? The top 20? :D If there are too few companies in too few sectors, there will be diversification problems again.