Let's look at the conversion palette. Certainly looks impressive, but why do we need so many different bullets??? They are basically all the same function: A universal input and an output type.
I suggest that the 16 marked bullets on the image, plus some others (e.g. "to variant"), be combined into a single universal bullet where we can select the desired output type by a simple right-click. Whatever we select will determine the actual icon, so once things are in place, everything will look exactly as before.
When we first drop the universal icon on the diagram (or insert it into a wire), the context menu appears and we must select the desired output.