With how well Tristan Thompson has been playing, I don't think they need Kevin Love. Kevin Love can't defend anywhere nearly as well as Tristan. Plus Tristan has been a monster on the offensive boards. Love doesn't do that for the Cavs.
They do however need the offense that Irving can provide. When healthy, Kyrie can be a huge offensive weapon for Cleveland. It's been great for Cleveland that JR Smith has been playing so well in the playoffs, but if they want a shot at the title, they need Kyrie to be healthy. Even then it will be tough. But without him, I just don't see Cleveland putting up much of a fight against Golden State.