The first question to answer here is simple:

What value would there be in requiring a minimum block size?

I see no value.

On 08/16/2015 05:30 PM, Jeff Garzik via bitcoin-dev wrote:
> "minimum" an interesting topic.
>
> - Traffic levels may not produce a minimum size block
> - Miners can always collude to produce a lowered maximum block size, a
> sort of minimum maximum
>
>
>
> On Sun, Aug 16, 2015 at 12:41 PM, Levin Keller via bitcoin-dev
> <bitcoin-dev@lists.linuxfoundation.org
> <mailto:bitcoin-dev@lists.linuxfoundation.org>> wrote:
>
>     Hey everyone,
>
>     as with the current "max block size" debate I was wondering: Is
>     anyone here in favor of a minimum block size (say 2 MB or so)? If
>     so I would be interested in an exchange (maybe off-list) of ideas.
>     I am in favor of a lower limit and am giving it quite a bit of
>     thought at the moment.
>
>     Cheers
>
>     Levin
>
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