A question abou Zac skin and animation problems

So, Zac can usually not be made skins for because he stretches too much. Solution to this has been found on "pool party" by making basically a blue base Zac and adding the mask and the recall animation and it's all cool. But question: Making a skin with a new model wouldn't mean potentially making a skin that doesn't need to stretch like base Zac? Or it would necessarily mean remaking every single animation from scrap and as a rsult having a legendary skin or so? For example, an "Earthrune Zac" could be made out of deploying vines that hold stones of different sizes. He'd just need to be "rolles up" for idle and "derolled out" for stretching animations. Would that be too expensive not to have a really good concept?