Another wish doubt it will be taken but here goes anyways.
In almost all files I place an old poser model of a human man in Vitruvian pose. I find it’s really needed and has helped me countless times designing, because one the hardest things is to get a sense of the proper scale. This doesn’t matter if you have measured plans but if you’re creating things from photos or imagination scale becomes important. Worse thing is to spend tons of time modeling a part to find it’s out of scale.
In speedtree I see they have taken my idea and have a silhouette of a man in the viewport when you model or scale things.
It would be helpful in the measure commands to have a few of these silhouettes like male, female, child, and the hands of male, female, child, and or animated sprites that can grasp parts like knobs or such things to help with the scaling of modeling.