You can't pick one thing.
Lack of content is what ruined the season. This includes less nights a week. Too much spent on nominations, tasks and running the BB game show. This includes lack of live updates, lack of video which isn't from the daily shows and lack of live stream.
When I look at the issues the show has now. We actually have had some interesting drama in the last episode, but it's kind of out of no where. I think we really have been held back from fulling knowing all the characters. As the exec producer of the original seasons on TEN said. When there's too much going on, the housemates sit around waiting for something to happen. Instead of getting on with it.
This so is what has happened this year. It's delayed dramas and tensions. Hence why BB has to force it by showing footage. People like Ryan can just coast because there's always something to do. Travis can be silly long enough for something to happen. Footage of housemates bitching, saying mean shit is always kept to a minimum in the show because there's too much of the tasks, the game show to fit into the show and it seems out of place.
As we noted very early on, plot lines come out of no where. Not so much now, but that corresponded with Alex M saying there's too much. Then qualifying it's too much little things that are hard to fit in. This is where we really needed more content. Clearly they didn't have room to actually develop the characters and small day to day stuff. However NINE didn't give them the digital rights to produce that and put it out there.
So yeah, live feeds would help. If it'd have saved the show.... who knows. It's a combination of missteps in providing content.