Thanks for the feedback, and I'll create a new suggestion.
In this case, though, the Admin Response didn't really address the suggestion. (It's the one about rounded collision co-ordinates). The example use case (pasting floating-point collision points) isn't solved by the Admin's response. And there's another issue raised with the their proposed solution, which I've put in the follow-up comment - but I imagine the discussion is over, as the "already exists" tag is the same as "case closed"?
All to say I'm not sure how I'd clarify these points with the Admin, when the response is through a tag, rather than a comment. The bug tracker provides the opportunity for clarification and brief discussion, which I'd vote for here, as it's a far more efficient process than reposting suggestions until they're resolved.
Food for thought anyway! Thanks again, I'll repost the suggestion and address the grid system.