Accelerating notice is not always indication that your employer doesn't find you valuable, I almost always prefer to do that, especially with highly productive

Accelerating notice is not always indication that your employer doesn't find you valuable, I almost always prefer to do that, especially with highly productive people: once an employee knows they are leaving and has announced it, anything they do other than tie up loose ends is more liability than benefit, and good people will do more. But their head is not 100% in it, they don't expect to have to maintain what they build, and most importantly they won't be around to ask questions of if things go wrong later, so it's almost always better to get them out the door ASAP.