If the Cavs decides to make changes to better matchup against GS, the Cs will improve their odds against them. They can't really improve a lot of their roster, that is already very good. All they can do is to give up something good at one aspect of their game to get better at the other.
To beat GS they need defense. Their defense as it was last postseason really stifled Celtics's offense, so that their changes can't do much more harm against Boston's offensive game plan this season.
Their offense, especially the combo of top tier shooting and Lebron + Kyrie going to the rim, is otherworldly. Even during the finals, they were playing great games at the offensive end. I don't think they can make it any better next season.