1)
What is the significance of "uv'Chol Keramim Misped"?
1.
Radak: They will lament, for there are no grapes.
2.
Malbim: Until now they used to celebrate and rejoice in vineyards with dances.
2)
What is the significance of "Ki E'evor b'Kirbecha"?
1.
Radak: I will pass amidst you to do evil to you, like "v'Avarti b'Eretz Mitzrayim" (Shemos 12:12).
2.
Malbim: He will pass among them to eradicate them and exile them, like "v'Avar Hashem Lingof Es Mitzrayim" (Shemos 12:23).