I find the contrast between Arjuna's attitude in these verses and his subsequent attitude when he is overcome by compassion striking. However, I don't know quite what to make of it. The commentators I have seen so far do not say anything in particular about this. Do any of you also feel similarly?

I am not able to see anything striking here. I can just see that his hatred of Duryodhana is strong appropriately, while his respect and love for Bheeshma, Drona, etc. makes him wilt. Later, even when he says the sort of things which make his body weak, he does not mention these Kaurava people explicitly.

I do not know the specific difference between निरीक्षे and अवेक्षे but I wonder if there is anything in the usage in 1-22 vs 1-23 or if both just mean "I see".

In the Translation, should it be "I will see" or "I see"?

When we think of the opposition as a group, it is easy to reduce their humanity and think only of the qualities common to them that differentiate them from us. However, when Arjuna gets closer, away from his own group, no longer a पक्षपाती as it were, he sees their individuality and how they have value to him -- Bhishma, Drona, Salya. I think the commentators don't say anything about this because it's hard to weave into the narrative of the Gita, that Arjuna needs to be regain his sense of duty. I have always felt that his विषद is easy for today's people to relate to in the aftermath of the constant large-scale warfare of the last hundred plus years, a lot of which was accomplished by dehumanizing the enemy.