I am afraid, it’s hard to give any specific timeline for the release of this feature.
You see, since we get a lot of requests and the process of developing new features sources is not easy, we have to be picky and choose the most popular requests first. If this request is going to gain ground, we’ll try to speed up the process 
As for the syncing opening hours with Google, I couldn’t agree more that it would be just an amazing addition. I’ve moved your idea to the separate thread. You can keep an eye on it here - Sync opening hours with Google