I do believe that increase the duration on the voting time, or finding new solutions for rewarding people after voting hours could lead to the better for the STEEM based platforms them self, but that could also have a big influence on the value of currency it self.

One day, all the STEEM will have been mined, unless they enhance the max supply... But the quicker we reach the maximum STEEM coins available the faster STEEM might see it's success as a high cost currency, as crypto prices are always determined by the market cap of available coins, coins that exist, and the activity around the coin.

With this, I think that creating another way to pay authors after voting hours is done, is an better ida than increasing voting time.

This might be all wrong, but this is just some reflections I had on this case.