I'm A Banana
Potassium-Rich
Absence of absence of evidence isn't evidence of absence of absence either...er... I mean the fact they haven't addressed it in articles and blogs doesn't mean its being changed or fixed either. Its more likely they haven't addressed it, because wouldn't they want to announce that they fixed another problem?
There's lots of reasons why they might not want to announce that. Two that leap to my mind immediately are first, that their survey feedback shows that most players aren't concerned about it, and second, that they want to save most of their surprises now for the actual release to make it an appealing purchase for those who have the playtest docs. There's literally an infinite number of other plausible reasons why they might not announce it.
There's no proof that it's been fixed, but you can't say that 5e will have that in it with much confidence. You can't prove I'm not a Turing-complete computer program, either, but it's not bloody likely. What's more likely, that you discovered a problem that no one else is aware of or that they stubbornly refuse to fix that will irreparably damage this game that their company has literally sunk millions of dollars into creating, or that these paid professionals are doing exactly the job they're paid to do and will end up delivering on their promises (which include not having a wizard overshadow a fighter unless you opt into it)?