The mushrooms will be back. That is the only reason for having the rear track rods in that "delta" shape in my view.
Anyway. Onto the car. This car is a RedBull in so many ways. The front wing. The coke bottle. The engine cover. The floor. The narrow diffuser. Peter has really influenced the bodywork. Not really a big deal that the car is so much like a RedBull because this is normal. The first RedBulls were Mclaren clones so things have come full circle.
Interesting Items i can see so far. hmm.
No front brake ducts. They must be hiding something.
Floor cut outs. and Narrow diffuser - just like redBull.
No secondary cooling in the Rool Hoop. This honda engine must be cool customer.
Red Bull like "cross over" slots on the underplates.
DRS linkage is integrated into the endplate - This type of DRS had reliability issues a few years ago but it seems Mclaren have sorted it out.