This is just a minor quirk of mine, but the whole "Right click to select the pickup position. Left-click to select the drop position" just feels backwards in my mind, and I frequently use the wrong click with trying to change my inserters. :(
And while holding shift does reverse the clicks, remembering to hold shift always throws my muscle memory off, so it still feels weird.

So just wondering, would it be possible to add a new optional mod setting that reverses how those clicks work by default?

Alternatively, if it's possible to manually edit the mod files to reverse how clicks work by default, that would also be cool if anyone knew how, and could tell me.

This shouldn't be too hard to implement, but I need to check a bunch of things. Editing this locally is doable, but it will not work in multiplayer. Also, I don't really remember if you need to change only one place or multiple.

I used right/left because you use right-click to pick structures and left-click to place them.

Ah ok, so that's what you based the mouse clicks on.

I think the reason I find it confusing is that I consider left click to be the 'Primary/First step' for something, and right click to be the 'Secondary/Second step'
And for inserters, the first thing they do is pick up something First, THEN they drop it somewhere else Second. At least that's how my brain works when using them.

So looking forward to the implementation (hopefully). :)