General unsolicited comment: without some additional explanation, the first spreadsheet/chart is virtually indecipherable.
DW and I file MFJ, so the later charts tell me (I think) that when our taxable income is between $116K and $128K we'll be paying high marginal rates. From a practical standpoint, if I had enough savings to allow our safe withdrawals to put us at, say, $130K every year, it would seem that one way to reduce taxes over the years would be to "bunch" withdrawals: go only up to $115K the first year, then go to $145 the next year, etc. It winds up being the same amount of total withdrawals overall, but only 1/2 as much would be subject to these higher marginal rates.
Other than that--if your withdrawals will put you slightly into "the hump," maybe withdraw from Roth's even in the early years of retirement when you hit the first dollar of the "the hump" (contrary to the boilerplate standard advice of spending taxable and tIRA money until they are gone, then spend the Roth money). "The hump" is fairly narrow, and even a moderate amount of Roth money might effectively avoid taxes at these higher rates for many years.
Other observations:
1) Getting taxed at these rates would be a good problem to have for DW and I. I don't expect that will happen.
2) If a retiree has expected withdrawals well above "the hump", then the relatively small window of high marginal rates shouldn't significantly affect their behavior.
Thanks for the post. There's a lot of work here, and I must admit that much of it is wasted on me.