From all I've read so far it sounds like the RC schools should be made church schools in the full meaning of the expression - i.e. they should be subsidized 90% by the RC church itself and 10% by tax payers - if they want to pick and choose the children attending those schools according to their religion or how active their family is. The way things are now everyone - RC or not - should be extended equal chances of attending a RC school.
That being said, I don't see why non-catholics would want to send their kids to a catholic school if they teach the kids the catholic doctrines there (not that I know for sure that they do that
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Besides, going to church on Sundays doesn't make anyone a good Christian the same way standing in your garage with the hood of your car open doesn't make you a mechanic