I will go out on a limb here and offer a bit of speculation as to why you may not be seeing any release notes for 1.4. 1.4 from what I gather is a massive data patch. With as much stuff as they try to cram into it, all of it may not work, or it may affect other aspects, as did a previous patch.
If all of it may not work, it shouldn't be released. If it affects other things, that should be discovered and rectified during QA testing of the patch. There simply are no excuses. Unfortunately, the gaming industry (as a whole, including the customers) needs to catch up to this. I work in the software industry myself, and I can tell you that if my company would ever release a product this unfinished, we would be out of business.
They are trying to get things right. Unfortunately they cannot fully test these patches on every single persons PS3 that plays this game. So they may have aspects of the patch that will not pass cert, so therefore cannot issue concrete info as to what will be in the patch until it passes cert.
What should or should not pass cert should be pretty crystal clear for all PS3 developers 5 years after the console has been released. If it is at all even possible to enter a grey area where you create something that may not be approved, it should simply be deemed a non-viable solution and another solution that is viable should be pursued. Furthermore, as other posters have pointed out - they only need to test it on a single PS3, and if they want to be
really thorough they can test it on all the various PS3 models. It's standardized hardware. There is no "Well, it might not work on YOUR particular PS3"-argument to be made.
With a game of this magnitude it is going to take time.
That time should have been spent
prior to release of the product. Again, there simply are no excuses.