Going back a few pages:
I’m not totally convinced by McLaren being that much behind – they’ve been so crippled by the engine performance that they’ve been running lower downforce and on occasions it’s been clear that the chassis is actually very good.
Not really on two counts. The rear suspension of the car looked to be a problem. The drivers frequently spoke of getting the tyres to work in the temperature range, and getting the mechanical grip from the rear to desired levels proved difficult. This resulted in much higher levels of down force being used than anticipated to get the rear to work.
Mclaren did not run a low down force set up.
This in turn required more than anticipated adjustments to the front to offset increased under steer. If the back of the car wasn’t right, it would also show up at the front of the car. People think that the “pace of development” in view of the numerous front wing changes made from race to race shows how aggressive and progressive McLaren was…but sometimes the opposite is true.
Once again both drivers complained about under steer issues, and the numerous wings were trying to compensate for this.
While Honda’s engine wasn’t ripping up trees, they cannot solely be to blame for a slow car, as the chassis was also a problem, hence high down force and higher drag.
If you remember in 2014 they had the “butterfly” suspension blockers on the car, that suspension was going to be carried over to the 2015 car.
I suspect PP stopped that from happening, but the rest of the suspension was set, and putting a new suspension design on the car would result in a totally new car built from the ground up, which can’t really be done during the season, hence it is critically important to have the chassis sorted right from the start as everything else, good or bad stems from it.
MClaren only resorted to a “conventional” rear suspension for 2016, but it may take a while for them to optimize it. Hopefully for 2017.