Why does everybody keep focusing on the blocksize issue, when the real issue is block generation frequenc?,. Is it just that blocksize is an apparently trivial change that everybody can understand, but they don't appreciate the broader implications such as possible mining centralisation.
I think a lot of people would argue that mining centralization is caused by economies of scale found in the bitcoin mining industry and wouldn't be affected much in either direction by any change (or lack thereof) in the block size.