Mine had more travel than it should have done, and when it was changed became worse so presume a 23mm was on before and then was changes to a standard 22mm causing the extra travell.

I lived with it but it was a pain in the wet as you became more likely to skid due to you having more trqavel then braking kicking in suddenly, and because it was a second car i never really became used to it.

May be worth looking into master cylinders with an even larger core, what is the size of a cosworth core?? may give a clue as to what is needed, if it is alot more than 22/23 then it may well be that, if not then look to something else as the cause