The idea with ReSpec is that it tries hard to be pubrules compliant. All document types that get published in TR need the Latest version link (AFAIK) and so there's no option to turn this off. The documentation is a bad example — it isn't a spec, and it should really be using a different template. (Now that ReSpec v2 is on its way to being stable, I think that I'll get around to giving the docs their own template at some point.)
Either way, the problem you describe ought to only come up while editing a spec that isn't published at all yet, which in an ideal world shouldn't be long (publish early and often, and all that).
I don't have specific plans to do so (myself) as I think the problem is small, largely painless, and short-lived by nature; whereas the issues (forgetting to remove the option when publishing and having to rerun pubrules, not linking to the latest TR version when it exists) are more painful. That being said, if you feel strongly about it feel free to go ahead and patch it! (noLatestURI maybe?)