They have "activated" SWF verification, while I can't see that mentioned in TFA it doesn't change the fact you're wrong. To quote the author of get_iplayer (linuxcentre forum, 19th Feb) "Seems that the BBC have switched on SWF Verification on their CDN's servers. Seems not to be a big problem at the moment as you say though. flvstreamer does not support that - only rtmpdump supports this AFAIK."
The main software problem with this is that get_iplayer uses flvstreamer and the "new" change meant that flvstreamer chocked with "no crypto" errors. I think it was possible to get a show by setting the retries right up so that it grabs a short chunk of the file before it fails, then resume and repeat. There was also a set of instructions posted elsewhere that allowed you to reconfigure get_iplayer to use rtmpdump which resolved the issue completely but wasn't a "supported" option.
The main practical problem is that the author has abandoned the software and the current main fork has been abandoned in favor of a complete rewrite (Prometheus). The main fundamental problem is the BBC seems intent on screwing over the people who pay the bills, the UK license fee payers, with DRM for no real gain.