This is one of the things I dislike about F1. Innovating withing regulations should be a big part of F1 but every time anyone innovates anything, everyone else goes "THAT'S CHEATING!". Either let innovations happen or turn F1 into a spec series. This constant crying foul is just boring.
Some innovations just aren't good ideas (like using rocket fuel). Some are outlawed because they'll cause a money war at the time (like active suspensions). Still others are outlawed due to the FIAs notion that it ruins the sport (like movable aerodynamic devices).
Clearly, Hamilton seems to think that this falls outside those categories.
Of this was used its enabling a setup change from qualy to race, which can be enormously beneficial if its ride height like this due to fuel load differences. Setup changes like this are banned to make teams compromise between qualy and race trim or accept performance losses for one or the other. It's meant as a small balancing measure for team performance and a reduction in costs .
In the old days, we had qualifying engines (not modes, entire single session engines), so it used to be full on extreme changes, I'm glad we don't anymore.
