clearly rashi (interpreting the gemoro) ascribes a keener understanding of halacha to the meikel.
The meikel perforce has a keen understanding, but not necessarily more than the machmir. Rash”i that writes the power of the osrim is merely not a proof. But still possible. Would you say that in the many cases that R’ Moshe Zt”l was machmir, he had a less keen understanding? (rhetorical question)
I have to research ??????, off the top of my head, it’s specific to that ????.
See for example, ???? ????? on ??? where he makes it clear that the ?????? went out of their way to find a ???? because of the tremendous difficulty involved.
As far as agunos, ??? ?? ??? ???? ????? ???!