In my opinion we should have the option to run at a lower hashrate maybe 10 or 15 ph that way our run would last longer and after all only 1 machine gets the best share and finds the block.
I agree with that, I'd also be down for a 15 PH/s or maybe even as low as 10 PH/s run that takes maybe up to a week.
Maybe pricing for this low amount of Hashing-power is also slightly better?