Every microflow has one start-icon and if you define one or more parameters you can place them anywhere in the window. Most people place the parameters nicely aligned at the top of the window, which takes up space and is not visually aligned with the start-icon.
Since parameters are logically bound and related to the start-icon, it makes more sense to always have them located directly next to the each other. Maybe even in a same fashion as the end-icon. .
When having multiple parameters, there can be a more compact solution than having every parameter have it's separate icon.
Let's combine them:
Perhaps this could be solved with a compromise - allowing people to drag and drop input parameters on top of each other to combine them (only visually) so you can merge them all if you like, or keep them separate so you can group and annotate them.
That works until you have many parameters going in that you might want to group more properly, having to stick to a "auto" generated format would leave you with no options for sticking some together with a nice annotation to describe the "group".