Thanks for this. I'm all in favour of modified n. It's good to see Steemit Inc is on the same page too. Of course, it's top level posts - not just comments - where this change is badly necessary.
The constant could be lower though. I'm seeing a lot of smaller accounts powering up to ~10-~50 MV of late. These are content creators and curators who may not risk-taking investors, but may want to power-up spare change for added influence. At 400, the curve is still too harsh on these voters. That said, 1 as proposed by Steemit Inc is perhaps too little to prevent abuse. I believe a compromise can be found in the middle, though I don't know what it is. Maybe look at the median MV of active users and target that as the point where the curve flattens out.