If you want 15m coins in circulation and you are planning a hard fork at 6000 after which POS kicks in, should you not then instead of making the blocks fewer, make it more to about 53500?

It seems that the hard fork will kick in then at 2014/07/09 23:46 PM GMT. If the current block explorer is up to date and POS kicks in at block 6000, POW will then end at 2014/07/21 7:46 AM GMT and total money supply will be an estimated 11,157,000. Extending the blocks to 53500 takes end of POW to 2014/07/26 11:39 AM GMT and money supply up to an estimated 14,872,000. P.S. POS block rewards are negligible.

I could of course be completely wrong