Ah, you're one of those that don't sport the infamous lime green ribbon! lol. I use curl sheen ribbon by Hallmark. Seems to be the closest to lime green. I have a roll packed in my Disney bag and it's even tied to the handles of all my luggage. I didn't spot anyone either, but someone spotted mine as we were having breakfast at Cape May before we left yesterday.
As far as I know, there is no construction at the villas. They are brand new so I wouldn't think they would need any refurbishment. We stayed at the BC for 2 nights before moving over to the villas. They were definitely working there, but I'm pretty sure they were closing off hallways as we saw signs, but no actual workers inside. As I said in my other reply, they were using the sidewalk on the Epcot side of the BC to transport the furniture and commodes. This sidewalk goes past the back side of the villas I believe. If I'm mistaken, I'm sure someone will correct me.