Aero development is relatively easy to observe since almost all alterations are external. But most mechanical changes are not easily seen, and often overlooked. But just like aero, every component of the car is scrutinized for achieving higher levels of performance.
If a wishbone is shortened by just two millimeters, that won't be easily noticed, but may have a huge impact on suspension performance.
Mechanical grip is important, and trust me, each and every team is working very hard on that. It's just that it isn't easily observed by observers.
For example, the track in Montreal is unique in various aspects. Almost every corner is very slow, and leads to a straight. If you don't get a good drive (derived from the mechanical setup) off all these corners, it will definitely have a negative imnpact on performance. Just watch the Montreal race and at the corners you will see some cars being able to handle the right-left transition and having to accelerate over the curbs. Some will appear quite uneasy in these areas, while others will make it look easy. At these low speeds it's all about mechanical grip, and it is very important.
A proud Canadian, and yes, HOCKEY is our game.