Re: Good but...
According to Netflix on Twitter lowering the bitrate won't actually affect the picture quality
Netflix UK & Ireland
"Hi, this is a technical change that shouldn't affect the quality of the streaming – you will continue to see content in the quality of your plan, 4K in your case (always depending on the connection and the device, as before), so your experience should be the same."
"Members will still get the level of service (4K, SD, etc) they have paid for, but at the lowest bitrate possible."