Not sure about diaphragms as I have not found myself needing this one. But there seems to be tools missing in terms of layering that would be helpful.
* I have for instance asked for changes to the tools that standardize the language, so that we are not jumping from layers to inches and then lines, unless we want to. I find that measuring in Inches and then layers is a nuisance when I just want to select a layer. I find this is is only useful if I keep switching the object. Leaving the FFF intact.
* I use multi layer patterns to increase durability several times over. But I can only define linear movements based on numerical Angles provided. I would enjoy being able to define more than this as infill, including concentric, and define an alternation. The same as Diaphragm can be defined.
* For now the only recourse for either of us is to create multiple FFF with the wizard and set the layers we need manually. Though this can be exceedingly tedious. Also may cause random and unpredictable crashes when editing a profile, saving a profile or entering print preview.