Not relevant for this weekend, but one thing to look out for for the Belgium GP at Spa is if there will be any changes regarding the wastegate exhaust pipes.
If qualifying mode is indeed banned and they'll use the energy efficient wastegate-mostely-closed race-mode throughout the weekend, I guess there will no longer be need for or benefit from a dual pipe solution. A single centred pipe might suffice. Saving some weight, space and CoG penalty.
Currently I think it's commonly accepted that in qualifying they run a wastefull but powerfull mode whereby they reduce power-sipping turbine load and just drive the compressor using the MGU-H in motoring mode. Using energy from the fully-charged battery where possible.
It might have some aerodynamic implications too if they stop sending that volume of exhaust gasses out through the wastegates in qualifying to blow the rear wing and join the already-upward flow of air. They might lose a tiny bit of aero performance.
Could be wrong about the actual detailed wastegate strategy though. I'm sure Gruntguru has more than a thing to say about the above simplification