I agree with more foliage and greenery that have a more natural form. I think we have enough 'bulbous' and rectangular shaped shrubs. Some packs do have really nice items for landscaping, especially with JA and IL. With IL, I only recently discovered, and was pleasantly surprised, to find decent-looking plants from the debug section, so now I'm curious to check what's available from the other packs.
And this probably won't happen, but it would be nice for all the current harvestable plants to be reworked so that they look like the actual plants (ie. the dragonfruit plant doesn't even look like a cactus). It's great that they were able to do this for certain plants like the pineapple and taro plants from IL, but it would be awesome if they can do this for all the ones we currently have.