They never really explained Ziggy's sister's continued absence either ... in real life the actor apparently left - temporarily - to finish her exams, although wouldn't she have known they were going to be coming up ... so why even take the role in the first place? Maybe she was struggling. They did used to have a tutor on set, but with few kids on the show it was probably another expense they didn't need ... although in saying that, Raffy was a similar age to that she played, so they would've had to have the tutor on set anyway.
Many of the changes (fewer cast and crew, fewer outdoor shots, etc.) were explained as being due to Covid but now things have sort-of returned to normal, they haven't been reinstated.
In real life, the building that holds the bait shop, upstairs apartment and cafe has been torn down to make way for a replica (but better built, without all the problems), which is why we don't see it on screen anymore. But having the coffee cart randomly set up on the lawn like that just looks misplaced.
The house where Alf, Roo and Marilyn live is quite a distance from Palm Beach - I don't know why they don't try and find a house closer.
Aside from the doctor and Remi, I don't like any of the new characters. They're just blah. I also struggle to understand what Xander is saying - he just mumbles.