1)
What is the meaning of "Lo Sish'enah Einei Ro'im"?
1.
Rashi: It is unlike it is now, that "v'Aznav Hachbed v'Einav Hasha" (6:10; he plastered over his eyes 1 ). Radak - they will not be blind and deaf to Hashem's word. Also above, it says "v'Sham'u ba'Yom ha'Hu Charashim Divrei Sefer" (29:18). Until then, they were like blind and deaf - "va'Y'atzem Es Eineichem" (29:10).
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Malbim: This will be "Ad Asher Im Sa'u Arim me'Ein Yoshev" (6:11). In the days of Chizkiyah, they will see and hear.