What use is a word processor that can't do headers and footers or a word count?

Surely the thing would have been to build up the iOS and iCloud offerings to the level of the desktop version, as opposed to castrating the desktop version...

I agree but the point was to make the documents viewable on all devices. I suspect that over time they will reintroduce features across the range.

The big one I saw people kicking off about was in Keynote, where they'd removed the option to have a separate screen for the speaker, so they could only have what the audience could see.

Hmm...

I've used the new keynote and still had the presenter screen.

The biggest thing for me is that they removed mail merge from pages and numbers.

I use it sometimes to create plist files of large amounts of data for apps.