This is a longshot. Its barely on theme for "Simple", and I don't assume the current API could even support this, UI-wise. However...

Just like controlling inserter hand-size via circuit-network supplied signals on the fly in vanilla,

Could the mod be expanded to set one or more of the configurations in the same manner, via circuitry?

Example: By supplying a "D" (ie. Direction), with a count of 0 or 1 or 2, one can decide if the output faces straight (default), left, or right.
And so on for the Dropoff-Lane Target (0 or 1) and Arm-Length (0 or 1).

Cheers, thanks for any consideration.

You're right about it not fitting the theme. Will not be added to this mod.

However it is an interesting idea.
I haven't really played around with circuit modding and I don't think it's gonna be good for perfomance. I'll play around with it someday. HMU on Discord about it.