I wish there were visual controls for flexbox settings, regardless of what BS version we choose. Visual controls like in Cwicly Builder for example. One can always hope! 
Are the ones in Options > Flexbox not enough? I do see more visual examples in your screenshot. I ask mostly as I’ve not had a need for more so far
Yes, they are enough, of course. But, I think you missed this part: regardless of what BS version, we choose.
When working with legacy projects, for example BS 3, then those options are not there. Plus, the visuals would be wonderful.
When editing a BS3 design those options are not there because Bootstrap 3 uses floats to handle the layout in place of the flexbox
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Time to update that BS3 project I’m thinking 
Yes. I think about that every second that I spent time on the project. It’s not in my control, unfortunately. If it could just remain there instead of disabling it. That would help me tremendously.