Here are two (minor) considerations

1) If you want to be pedantic about HTTP, RFC 2616 states with respect to responses from URIs containing query strings that "caches MUST NOT treat responses to such URIs as fresh unless the server provides an explicit expiration time." Although this clause is broadly ignored by the vast majority of middleware, it could be argued that slashes are more correct. http://www.w3.org/Protocols/rfc2616/rfc2616-sec13.html#sec13...

2) Middleware like Squid comes with strip_query_terms on by default so if you put Squid in front of a Riak cluster and you wanted to see what was actually being run you'd have to make changes to the config file. Otherwise the request uri in the logs just reads "/buckets/loot/index?"