Given that there are times when the poster's intent may not be entirely clear, and that there seems to be a flat out prohibition on touching any code, I'd like to suggest that one additional element be added to the suggested edit workflow.
I would like the original poster to be notified of suggested edits have the power to approve or roll back any suggested edit to their post. For the purposes of one's own posts, one should be the ultimate moderator after all nobody knows better what you meant than you do.
Additionally a (default unchecked) checkbox might be added next to the save button, that says:
"Suggest this edit only to the original poster" Checking this would keep the suggested edit out of the review queue, and only the original poster could approve it. The use case for this is an edit where one is attempting to help the user clarify their question but there is a risk that you are changing the meaning of their question, and the person suggesting the edit wants to check with the original poster rather than relying on the review queue.
I've seen posts that seem to ask a basically good question with some poor quality code samples (bad syntax, way too long etc), or what appears to be a bit of flipped around logic in the Engilsh that might or might not be a typo or mis-edit. These posts seem to garner down votes, often without explanatory comments. I think it would be best if there were some avenue beyond downvotes and more detailed/explicit than comments with which to collaborate with the OP.
This will also help make SE sites a bit more friendly and inviting. After all it's much more friendly to say "did you mean this?" with a suggested edit than "-1 fix your syntax please"