>>3796704They haven't dropped astrotracer, you can still use it, but you need the external GPS unit do so. The camera doesn't have the GPS unit in because they couldn't fit it in with the fuckhuge new viewfinder.
They (probably rightly) assumed there were more people who would benefit from the vastly improved viewfinder and that active who really wanted astrotracer could still use it by getting the GPS unit.
They could probably have done both, but then the cavers would probably have been significantly bigger.