It's not in the OP, haven't seen anything about it yet.
Willow Springs has way more shrubbery along the track edge now. I noticed it straight away, but can definitely confirm as going into turn 3, I used to brake when adjacent to a tiny bush that stood on it's own about 30 meters before the corner. Now there's dozens of them there.
Also, I don't understand how water spray is new, it's always been there hasn't it? The further off the racing/dry line you went, the more slippery it became and the more spray the tires kicked up. If that's what is being refered to, it's been like that for a long time. I'll do a wet race though to see if you guys are on about something different.