What's the best strategy for cropping 1080p video?

I just shot a panel discussion in 1080p, and because of all the panning back and forth there are parts that could benefit from some cropping (in other words, I would set a keyframe and use the transform tool to enlarge slightly in order to center the speaker in the frame).
1080p is WAY larger than the indended final product. Should I plow straight ahead and assume that outputting to a smaller resolution will take care of concerns over degredation? or should I anticipate issues from the start and specifiy a smaller resolution as part of bringing the video into the timeline?

not really.
Let's assume I have auto render (or background rendering) turned off. I'll finish all my transform-tool work, then "render all" while I run down to the corner Starbucks.
I think in terms of Photoshop. If the canvas is smaller than the clip, then introducing the video to the timeline -or canvas, would be the point when the clip gets repositioned... or, if the clip is OK, then I would just use the transform tool to reduce it to fit the frame.
Again, thinking in Photoshop terms, if the final exported product is smaller that the original, then using the transform tool to increase the clip size has less pronounced effect. Alas, in Photoshop,  outputting at a smaller size (for web) means you aren't going to see the pixels that got "tore up".
I'm not sure I can expect the same thing to happen in the wonderful world of video editing.

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