I agree that actual serious investigative journalism is very important in uncovering miscarriages of justice.
But these three articles are not serious investigative journalism. They are selectively picking opinions and facts to support a narrative. Not considering the big picture of the prosecution case. It didn't all rest on one or two points. Presumably the articles were written with the aim of grabbing readers attention.
Lucy has a very experienced defence team who chose to not use these experts in Court. In newspaper quotes the experts aren't challenged, aren't cross examined, don't need to defend what they have said, don't have any scrutiny.
Had they been called to testify in court, we may have seen that their opinions were not reliable, or even worked against Lucy's defence. e.g. if a defence expert said something in the article that helped defend her, but when questioned they also held another opinion that showed her to be lying on another point.
Lucy continued to use this defence team for her appeal and future case. Presumably she (and her family and other advisers) accepted her barrister's explanation for not using these experts, even if we the public don't know the exact reasons.
Whilst I do think Lucy is guilty, I would be very interested if genuine new evidence and information emerged to suggest otherwise. I don't think that is the case with these articles.