Where it’s already May, September is not long to wait.
Whether you like or dislike the camera bump, I personally feel the new cameras will be worth the short wait, especially if you’re looking at a Xs/Max. That’s assuming the camera is important to you.
That said, the two cameras in the Xs/Max are very nice as is. You could still wait until September and see of you could get one of those at a substantial discount when the XI’s are released.