I read a rumor that the boost could only be used at stage starts and very slow corner exits. Possibbly they are scared it will be too much power to use elsewherr. Sad to see the competitive aspect of where to use the boost not utilized.
I don’t see them changing the restrictor. It would mean a lot of development work to get the engines working with a smaller restrictor. So far they’ve kept saying engines will remain the same.