Depending on how much you accumulate over time, RMDs may eventually make the choice for you as far as which tax bracket you will be in.
I have mix of Roth and Traditional for my 401k, as well as having inherited a similarly sized but all traditional 401k when my spouse passed from cancer last year. Our plans were based on joint tax rate; but those higher brackets kick in much sooner for me now. I'm very thankful that I decided to have some of my contributions be Roth because it will give me increased flexibility post retirement, and decreases the amount of my RMDs.
All of my grandparents lived into their 80s, as did both of my parents, so even with the increased start age, I'm still planning as if I'll have a number of RMD years ahead of me.