I read your linked article, twice. I can't find anything in the article that points to the fossil record being improperly dated.
If anything, it greatly bolsters the evolutionary belief that there is genetic linkage between uniquely distinct species that inhabited the earth at different times. In this case, the DNA material found in the duck-billed dinosaur shares genetic markers with our modern day poultry or amphibians, specifically chickens and frogs.
The possibility that soft tissue survived 80 million years is preposterous. The finding calls into question the dating of the species as 80 million years. In researching opinion on the viability of tissue surviving 80 million years the most I found that any “scientist” was able to conjecture was that it was unlikely soft tissue could survive any more than 10,000 years. If you can point me to scientific evidence that this tissue can survive 80 million years please do. I’d be glad to read your “little” article on that research.