I realised that after I wrote the message, but it's still a pain in the backside.

The previous system where you dragged a box and if it was too big it told you dynamically was way better. Plus you could actually see a list of the cached areas....

This mechanism has me binary chopping in zoom levels and then I forget exactly where I've cached.

They're apparently adding a button, but this is just going to save you typing in "OK Maps", but it's still a pale imitation of its former self!

Edit:

The button is there in mine, you have to click in the search area, then click on the map to dismiss the keyboard and then you can click "make this map available offline".

Rubbish!