The other thing that Xara says it now does that Serif cannot is the basic online editor so you can update bits of text and pictures on any device without the need to open the fully programme. Have you tested this at all?

No.

I also discovered yesterday that there is something called Designer Pro 11 which seems to encompass all the Xara products. Does it make sense to buy one programme to do it all?

Many people make that choice, but it depends on your usage (and budget).