I used to use the 1.21 berry bushes to replicate "leaves" and overgrown foliage, but with the new 1.22 update, there's no way to really replicate that anymore except by cheating in leaves from the creative menu. I think something like shrubs or flower bushes would be a great way to get a "leaf" block without having to make a specific tool for leaves (except maybe the shears?) and keeping the new berry bush design! More foliage decor types in general would always be appreciated because, oddly enough, there's not that many, especially stackable, so it would be nice to have more variants.