Just in terms of the new direction:
So we know the new person with evidence isn't LT as she is not new to the matter.
But they have removed her from FFC and MFC house [on account of the new information].
It follows that they've interviewed her, sought an AVO, and charged the FCs for assault.
The FGC died months ago, and her car has been collected for forensic testing now. That the car was collected at the same time LT was removed from her FCs says the new information was separate to those events, but precipitated them.
The new information is said to have come during the inquiry, and so I'm of the opinion that something raised during the inquiry alerted someone to the fact that they may have information or have been a witness, when they previously didn't believe they were.
IMO, the issues about the timing of the photo fits this because if you saw something random earlier in the morning you wouldn't have thought it was relevant given we were all told WT was alive and colouring in on the back deck at 9.30am. During the inquiry when the time tentatively opened up to 7.30am-11am then a neighbour, someone hiking, or a random passer-by might have thought 'well actually... earlier i did see something, but I discounted it because he was alive in the photo two hours later'.
IMO the search areas 'not being speculative in any way' means there was a witness, or someone had to mind a specific account of events.
I don't know that I believe the FFC and/or the MFC and FGC were involved in a coverup. The still hot tea and strange 000 call and the issues with the shoes and their timelines leads me to think yes. But everything else has me thinking it's unlikely - seemingly 'normal' people don't dispose of a child's body, make a cup of tea and then get the country riled up about said child's disappearance.
But I do think they've lied about the timeframe, and other than a cover up, I can't fathom why. In fact a kidnapping in FFC's "5 minutes" in a yard in Kendall is extremely unlikely, unless there was alot more time for it to have taken place. If FFC had sent WT down to the road to watch for dad earlier, the time it would have allowed for him to wander or be snatched would have been more easily believable. (Noting also, that they did mention this in some accounts and this is what LT said WT was doing).