Y'all are complaining that it doesn't sound like her old material when she hasn't released a solo single in 7/8 years. She's not going to sound exactly the same all these years later.
That being said, I think it's kind of brilliant. A little safe, but radio will eat it up. Not everything has to be a total dance floor anthem bop in order for it to be a single!
Try being absent from the music industry as a solo artist for 8 years and try experimenting with your lead single. It could do really well, or it could flop even worse, so I think it was smart of her to release a "safe" song to lure the GP back in and leave the experiments for the fans who bought the album and later single releases.
I love the beat at the start, I wish THAT was throughout the whole song but nonetheless it's still awesome. Some parts (the bridge I think) are giving me a bit of Hollaback Girl teas. Can't wait to give Queen Gwen my coins.