I support the change to 4 weeks and i believe it will bring more people and also small investors. Not everyone starts using steemit with commitment in mind, all start using it as an experiment and through involvement commitment may come. I think 13 weeks sounds a little suspicious for an outsider and discouraging for a small investor to play around with steem and leave, if he likes. in a short amount of time.
What i see is that we have the committed users in one hand, that produce quality material and engage with the community and on the other, a mass of low quality posts users upload for various reasons. What we do not have is sth in between, people that want to invest, lets say 500$, play the game and leave 1000$ in short time. Use Steem as a side project and pop up from time to time. But they will need flexibility and freedom and the 4 weeks powerdown will play a big part in this.