doubleofive said:

Bester said:

It's just an easy way to resell the series - "Come and watch/buy this! It's got loads of new stuff you haven't seen before!"

It's a proven technique.
But a lot of the time they won't even mention that they made more changes. It's just assumed now.

And to answer the original post: I have no doubt in my mind that each new format will bring new changes.

Word-of-mouth can be a pretty powerful self-perpetuating hype machine (even if a large element of it is negative).