If the Mavic 3E is to replace the Phantom 4 Pro, why was bracketing removed?  It's hard to upgrade when some of the functionality has been removed.

I agree. This would be so nice to have and easy for them to implement as well. Especially when Smart Photo mode has been available since day 1. I've manually taken a photo, changed exposure, taken a photo, changed exposure, and so on and so on. While it'll HDR merge successfully in post it isn't exactly ideal and takes too long in between shots. DJI needs to add this.