I think though the Borg were never really ever going to work if they appeared all the time. Even TNG's Borg stories got stale and they only had about five of them.
I'd be interested to hear how people would make the Borg a reoccurring enemy but not Voyagerize them.
Not too hard.
Have the Borg return.
But at PRECISE intervals of television series time.
For example, there were 31 episodes between Q-Who and BOBW.
Why not have the Borg appear again in force exactly 31 episodes after BOBW?
And so on and so on.
The ominous part is the "countdown" where fans know the Borg will return (and eventually the crew sees the pattern as well) and we see tension rise as we wonder just what new way the crew would come up with to defeat them this time.