1)
Why did Yechezkel talk about himself in the third person?
1.
Radak: He speaks on behalf of Hashem. The same applies to "Ani Hashem Elokim."
2)
What does "b'Vo'ah" refer to?
1.
Rashi: When this evil comes.
2.
Radak: When comes the evil tiding of Churban Beis ha'Mikdash.