A huge problem for me right now is that Merchant Center has disapproved about 70% of my products, so I can't get my best-selling items listed.
I sell optical accessories for guns (scopes, rangefinders, etc), so disapprovals always been a problem that I had to email them about, but now it's worse. I have products that are approved, and nearly identical products disapproved. A green model XYZ is approved, but the brown XYZ is disapproved. It makes no sense.
I've emailed the Merchant Center team many times, and get canned replies. They're not going to do anything.
Yesterday I signed up with Shopping.com so I can get listed on Bing's shopping network. The products I sell are listed already by other retailers, so apparently Shopping.com/Bing's computers can tell that a green XYZ is the same as a brown XYZ.
Once everything is set up with Bing, I'll watch it and hopefully be able to drop Google.