I'm sure this has come up before (possibly even from me) but it'd be great to be able to copy bodies / components from one design and paste them into another (or drag them to the tab of another and drop them in).
As nearly as I can tell the current workflow for that is to «save a copy as», create a whole new design and then place the parts which clutters the dashboard (with things nearly indistinguishably named by default) and seems like a few needless extra / time consuming steps (especially given that the cloud sync isn't instantanious)