I'm inclined to agree with Dax and Tom, simply because it's a tad unrealistic. Certain corners like Ascari are cut pretty deep in real life. There seems to be a stigma about using so much of the kerb in some series, not sure why as it produces some great racing and makes it much more clear cut to tell who is taking too much of a shortcut and gaining time. If not having two wheels on the kerb all the way throughout the track, I would at least ask for that rule to apply to the second chicane and Ascari, as those are the problem corners that are naturally cut in real life, but more importantly, where most of the overtaking happens.
Of course, it's your series at the end of the day, not mine, but I'm just giving my two cents 👍