I personally find the way Randomise Transform works to be a bit confusing. The problem goes for all modes (location, rotation, scale) but it is most noticeable when randomising scale.
If I understand it correctly, setting the number to 1.15 would set the boundaries for the randomisation to 0.85 - 1.15, which is not very clear in this UI. It gets worse when I set it to a number below 1 - is it still the maximum? What's the minimum then?
I would like to propose the following design for this: work with actual, defined boundaries - minimum and maximum values.
Though it's not really a huge issue in the location and rotation modes, I would extend it there for consistency.
While not exactly easier on the eyes than the current UI, I feel this offers more control and predictability than using one number that the user has to imagine going in both directions of the axis. And when scaling, no-idea-where.