the heel increase shown, has seriously altered the balance of the original design & it will be only a matter of time before the shank under its increased strain will break across the heel seat.
once this happens the heel will try to fall backwards, as the shoe tries to sit back to its original & correct height.
I only hope you aren't walking down some stairs when this happens!
Raising or recommending a raise that is incorrect for the shoe design carries a huge amount of liability & I would NOT recommend such an alteration, it is dangerous.
Lee