The interesting thing is that they have unveiled it so early rather that trying to obfuscate it to give the other teams less time.
Dont think it really matters, from what people have been saying about it today it would take half a season to replicate it. Plus Merc actually have to test it themselves to make sure it works and does what they designed it to do.
It sounds like no one can exactly work out what its doing, whether theyre trying to reduce wear on the fronts down the straights or actively scrubbing them slightly to keep heat in the tyres down long straights so they have better performance in the next corner, either way having a device that can adjust the toe could be hugely beneficial to them, it might not be needed every lap of every track, but imagine if you could keep the front tyres at full temp behind a safety car, or cool them off more on hot tracks. Its a fascinating idea.