I agree with your points. I don't want those things either. Though I'm not opposed to a three day fixed payout cycle with a three month secondary cycle to keep people sticking around.
Also, I think 30 weeks would be best for power downs, with 3% per week until the 30th week when the remaining 13% is released.
I have my reasons for this, but I shall save a long-winded explanation on this post, as it's not related to the subject matter.