The only that scene would ever really be a rehash is if Kylo and Han got in a lightsaber duel and/or Han sacrificed himself. As it stands the scene being conversation based adds a new elements that isn’t really in STAR WARS. Sure Ben and Vader talked but it was mostly taunting whereas Ben and Han actually had a conversation. Also the mindset if the characters is quite different. Vader has no qualms about killing ben while Kylo is conflicted. Ben has given up hope on Vader whereas Han still has hope his Son could go back to the side of decency and that even though his son has done terrible things his actions can be rectified.

The scene is only a rehash is you ignore certain details.