Joseph,
Avram, is it not obvious the decision of Hashem’s “mind” was that Reb Elechonon should leave this world al kiddush Hashem?
Of course.
How does attributing Hashem’s decision to the Chofetz Chaim’s tefilos detract from his honor?
Because A: I don’t think the Chofetz Chaim would have appreciated such an attribution to his tefillos, and had such a statement been made during his lifetime, it would have caused him pain, and B: Who are we to make such attributions in the first place?