I'd like to see a revamped version of the Borg. Something to make them actually scary again. Perhaps more like the husks in Mass Effect.
I would re-imagine a Borg Cube as basically a giant swiss army knife whose sole reason to exist is to eat other starships. It's mainly equipped with various forms of tractor beams that follow weird loop-like paths, like tendrils or tentacles. When the Cube grabs you, it starts pulling your ship apart: it peels off the hull plating like banana, rips the structural frame to bits like a kid with a kit-kat bar. It keeps ripping your ship apart and taking whole sections out at a time, takes everything of value, and then discards the rest like so much garbage.
A Borg cube is not a "collective" of minds at all, it's a single organism made up of many parts. There is no possibility of individuality, because there is no collective, there's just "The Borg." The cube only sees individual life forms as elements it can consume, and it sees a person's brain as just one more cell it can digest and add to itself for its own growth. The people it assimilates might even keep their individuality afterwards, fully conscious, but trapped forever as part of the Borg.
A single Borg drone is like a psychotic surgeon who can stun you and dissect you in less time than it took me to write this post. They don't actually talk to anyone ever; when you hear the drones saying "resistance is futile" it's not the Borg talking to you, it's those few drones who are still conscious (well, sort of conscious) all synching up and trying to warn you. And should you be brave enough to beam aboard a Borg ship for some recon, the drones will mostly just ignore you unless they consider you a threat, but as they shamble past you their various errands don't be surprised if you hear one of them mutter "please... kill me..."
Emphasize that an "individual Borg" is the cube, not the drones. They are not interested in political conquest or wealth, and they don't really even care about planets or species. They are solitary hunters, searching for resources they can consume. When you attract their attention, they will pursue you relentlessly, they will take everything you have, strip your ship to the bulkheads, peel the flesh from your bones and plug your children (or pieces of them, at least) into their machinery to make it run faster. Anything they can't use, they'll move on, and look for something else they can eat. And you can't stop it -- EVER -- because even if you damage it, it just regenerates and comes back stronger. The only thing you can do is hide, run, or pray.
