Still NOT true.
As revised, section 22.1 of the Citizenship Act now provides (verbatim quote):
22.1 (1) An application for judicial review with respect to any matter under this Act may be made only with leave of the Court.
(2) The following provisions govern an application for leave:
(a) the application must be filed in the Registry of the Court and served on the other party within 30 days after the day on which the applicant is notified of or otherwise becomes aware of the matter;
(b) a judge of the Court may, for special reasons, allow an extended time for filing and serving the application;
(c) a judge of the Court shall dispose of the application without delay and in a summary way and, unless a judge of the Court directs otherwise, without personal appearance; and
(d) no appeal lies from the decision of the Court with respect to the application or with respect to an interlocutory decision.
(see section of Citizenship Act under the title (clue) "Judicial Review")
Section 22.2 governs the judicial review. It also allows further appeal to the Federal Court of Appeal if the Federal Court Justice certifies that a serious question of general importance is involved.
No leave from the Minister is required to obtain leave to appeal. The application for leave is made to the Federal Court, not to the Minister.
You may be confused about the right to a hearing regarding revocation for fraud; per the new procedure for revoking citizenship for fraud, as revised section 10(5) provides that a hearing may be held "if the Minister, on the basis of prescribed factors, is of the opinion that a hearing is required."
And yes, this is one of the provisions which is at least likely to face a serious challenge, given the right to fair procedure. But this is not about obtaining judicial review before the courts. That is for the Courts to decide.