Here's what I (as a relatively poorly informed AU citizen who's 'travelled a bit') don't understand about the reaction to this news. It's clearly not the ideal

Here's what I (as a relatively poorly informed AU citizen who's 'travelled a bit') don't understand about the reaction to this news. It's clearly not the ideal end-game state. But, it seems to be a marked improvement on the previous (half-century-long) situation. And in order to get from current to ideal, there'll be some intermediary stuff. In tech this is a common and well understood progression - ideally it's short, well managed, not-too-painful, etc. But basically unavoidable. So why is this announcement being judged in terms of 'This isn't perfect'?