Working with multi-body parts, or any other part for that matter, the ability to color code your model-tree could prove rather help full.
The model-tree can at times be quite a messy thing to navigate. moving up and down, and locating the correct "fillet" or, "sketch" is not always a easy task. I sometimes use the rename option of certain features to help me, but it dosnt exactly make the specific feature stand out.
in Photoshop, layers has the option of color-coding 7 predefined colors just by right-clicking the layer and assigning the chosen color.
I find this very helpful, as it allows you to make your own little systems, either highlighting one or few main features, or even color coding all of it, into meningsfuld sections, depending on your design.
I imaging this would be a very easy implementation into the program. however it could also be an idea to take this a step further, allowing to sort feathers into folders or sub-groups, just like you do with parts in assemblys. but maybe this is harder to do coding wise?