Maybe you can click using mouse wheel when hovering over terrain.
Mouse wheel clicking is not a great user experience :/. Technically I've already assigned that button, though, which centers the view on Cogmind (the only way to do that without the keyboard, instead of using RMB to approximately recenter, or simply moving to recenter).
How about, if you have no active weapons, then rmb is inspecting?
And accordingly, if you have no active weapons, then lmb does not enter firing mode.
Overall I think this might contribute to confusion about the controls, which is why I wouldn't want to jump to this approach.
Eventually something will have to be done about this, though, so it might have to involve a solution like this.
A bit off topic, but I would also like: if you hold shift (or whatever), then lmb movement does not stop when detecting threat.
What's your purpose here? My guess is to allow continued movement when watchers are in view (?). Either way, I'm this feature will cause you a
lot more trouble than you think. But it's okay if you don't mind always giving hostiles the first shot...