I don't think there's a lot they can do, as they're pretty deeply leveraged to put together this current team.
Trading Love seems like the most obvious solution, but it's not clear for whom. And they have to ask the question -- is it worth trading Love for pieces to maybe have a better chance against the Warriors if it undermines their ability to so thoroughly dominate the East?
Love has been pretty good against the Cavs' Eastern Conference opponents.
Honestly, I don't know if they necessarily need to do anything. Kyrie - LeBron - Love - Thompson is going to continue to dominate the East for at least another few years, and simply getting to the Finals with a healthy LeBron on your team (even as he gets to age 33, 34, 35) should be enough to give you a chance of winning a title if the Warriors have some bad luck with injuries or suspensions.
That's what happened last season after all. A confluence of factors created an opening for the Cavs to steal a title, and they did so in epic fashion.