The timing at some points, in the aerial shots especially, looks Imai-ish. That said, I don't feel qualified to assess whether the actual drawings are his....

Imai drew most of the 3dmg cuts for episode 5 himself according to his twitter at the date of airing but this is a clear step below the rest of what he's tagged on. If I had to guess he just made some adjustments as action animation director if that, since he doesn't have much of a record of re-animating cuts that aren't his own across his long tenure on the series. I'd say it has less traits than post #41807 which is in a similar situation (but you can tell is not his genga) so probably not worth a tag.