Re: I like Electron but...
If you works for you, that's grand. I've not used my MX Master mouse without the Setpoint software, so in a way my ignorance is the mirror image of yours! :)
That said, the Logitech Setpoint software for Windows includes a clone of OSX's 'Exposé' task-switcher which I value greatly and map to one of the mouse's many buttons. It's only selectable if Setpoint detects you're using an MX mouse, oddly.
Beyond that, I've only used the software to configure buttons, which I assume Windows can do natively. There's also an option in Setpoint to have different button configs for different applications, and I attempted to map keyboard keys to various mouse buttons to streamline my Civ 5 experience (turns out I was playing it wrong).
I don't need any software to tell me the mouse's battery level, since the mouse has LEDs for this purpose.
I'm not really a gamer, but someone who is might have a different response to your question.