The Howling Conch causes it to rain in Hamlet, rather than make strong winds blow. This could be intentional, but given the presence of winds in the DLC, I think it's an oversight.
The Old Bell functions in Hamlet, which I'm also pretty sure is an oversight, as it does not function in SW.
Steps to Reproduce
Use the Old Bell and Howling Conch in Hamlet, and you'll notice they function the same as in RoG, even though by precedent they should function like they do in SW.
This issue has been fixed in either a future version or updated in a previous version.