Keep waiting if you don't like it. I think the screen is great for what it is, it's a bummer I can't have a competitive gaming sweatfest on it but it's one thousand percent fine for video work, which is what I bought it for. Works the same as my Late 2016, which worked the same as my Late 2013 rMBP. Motion blur is an expected component of cinematography and the consumer view of eliminating all blur is not shared in the industry. The level of ghosting on these displays is not enough to compromise their usefulness in video work. If you're mastering on this laptop for major broadcast or distribution you really should be using a proper grading monitor or sending to a color house for finishing anyways.
Right now this display is what Apple believes is the best compromise between thickness, response time, image quality, brightness, and power consumption. The battery capacity is at the FAA legal limit and Intel's CPUs are as hot as ever so there's simply no room for improvement at the moment without going in a direction they don't want to go, like backpedaling on battery life claims or making the notebook even thicker than it already is with the 16"s increase in size. If this is a dealbreaker for you wait a few more years or buy a Dell or some other machine with a low-ppi 1080p high refresh display. This is where things stand with Apple, and there are hundreds of thousands of happy customers working on these machines and not worrying about response time.