For starters, there'd almost certainly be no "Legacy" and no Sela.
I'm not sure what they would've had Worf do. They never DID say what his job in season 1 was, did they? It's possible they might've still had some of the Klingon-heavy episodes like "Sins of the Father" and "Redemption" (though again, no Sela).
They MIGHT have still done "Yesterday's Enterprise" (but probably with a very different final act).
Any other changes you can think of?
I'm not sure what they would've had Worf do. They never DID say what his job in season 1 was, did they? It's possible they might've still had some of the Klingon-heavy episodes like "Sins of the Father" and "Redemption" (though again, no Sela).
They MIGHT have still done "Yesterday's Enterprise" (but probably with a very different final act).
Any other changes you can think of?