Re: Why didn't the Borg...
Pretty much. The one time we see the Borg actually "live up to their potential" is in the "Destiny" trilogy of novels, and for the most part that goes exactly the way you'd expect a large-scale incursion of the Borg into Federation space to go.
It was the best of Trek, it was the worst of Trek...
"If I lean over, I leave myself open to wedgies, wet willies, or even the dreaded Rear Admiral!"