Rewriting older levels is not new. However it has gotten out of control these past few weeks. I think King are trying to rewrite levels to accommodate the new super colour bombs and in the process are ruining the original concept of many levels to such an extent that the game has become monotonous and pointless.
Some levels have become faulty through the rewrites, which then gets picked up by King's computers resulting in changes to these levels which make them far too easy to pass. So the easy levels are often over in one or two moves while of course the harder ones hold players up as they are still fixed for us to fail. This does not make for challenging or satisfying gameplay.