“Rav Ovadiah permitted Agunahs to remarry. Rav Ovadiah permitted the sale of Holy Land during Shmitta. Rav Ovadiah halachically permitted Oslo. Arguably, No Sage over the last several hundred years ever ruled as leniently ”
Hmm I don’t know how you came to that conclusion – Agunahs have always been a source of seeking Kulahs throughout the ages by ALL poskim. As for Heter Mechira, I would rather not comment. Same with Oslo.
I will say one thing, sorry, the Heter on Pe’ah Nuchris is much clearer and leKatchila than the Heter Mechira..