Avi: Chacham Ovadia is on the record as supporting the pullout. He is not on any record as later regretting his original position. In either event, at most regretting it would demonstrate he believes giving land didn’t bring peace in that instance. It would not reverse his fundamental position that if peace can be achieved by giving up sovereignty of the land then it is halachicly mandatory to give up sovereignty to preserve Jewish lives.
And the halachic position that it is halachicly mandatory to give up sovereignty to preserve Jewish lives is the position of the Gedolei Yisroel across streams, Sephardic and Ashkenazic. Rav Shach explicit stated land for peace is “permitted and necessary to compromise on even half of the Land of Israel”.
And the Brisker Rov recently stated that if the zionist government continues in its efforts to make it untenable for Bnei Yeshiva to devote themselves to Limud Torah, it may be necessary and required for the Bnei Torah to move out of Eretz Yisroel in order to continue their Torah studies.