We are reading too much into the legal wordings. The minister has clearly stated "on video" that "if granted" wording is to prevent applications on the way to the Airport. There is a big reason why there have been inordinate delays in the last because people beleived they can miss test, citizenship hearing schedule and even oath "a few times" as they are entitled to citizenship upon completion of 3/4 rule. The minister clearly said that after getting citizenship the person can leave and do whatever he wants. This whole clause is just to "officialise" the already prevalent RQing of doubtful applications for more than 3 years just so that those guys will lose their PR and therefore lose their entitlement to citizenship.
It is simply unconstitutional to prohibit your freedom of movement under the charter of rights, after you become a citizen.
So yes, you can "technically " leave forever to another country.
I don't know why we go on this roundabout of fear psychosis. How can they revoke your citizenship if you don't have any other passport? UN doesn't allow anyone to become stateless.
And this clause too will affect only when you apply and there is a line in the form stating the same, which is a good 6 months from now. Relax guys.