Megalomaniak I'm pretty sure it's just up to expectations and preferences.
I could see that. I've been using the Space Mouse off and on for like 15 years, so I am very comfortable with it. When I first got it it did seem very fast, but it's just sensitive. Also note that the focus/pivot is on the selected object (or the world origin, if nothing is selected). The movement will slow down as you get closer to the object.
I tried to tweak it to get a balance where you could still control and get up close to something down to like 10cm but it would still feel okay up to like 10m. If you go too far out it will get fast, so if you have a large level you might have to click on an object closer to the camera.
I wanted to add sliders to adjust the speed, but it doesn't look like you can export variables in editor plugins. My only option was to make a new dock, where I could attach settings. I might still want to do that, depending on the feedback I get. In the meantime, you can open the file addons/spacemouse/SpaceMouse.gd and look for these two variables.
const translate_speed = 0.1
const rotate_speed = 0.02
Feel free to change them if you like (you will have to enable/disable the plugin to see the effect). Converting the code to fly the camera is probably a lot more work, but I can look into it. I might have to make that dock anyway, so if that's the case I can put in some other options.
