After merging a question as a duplicate, StackExchange currently redirects to a page which gives a text summary of the operations carried out in the database...and that's it. No link back to the main site, no user-friendly messages - nothing. It looks like a hack job right now.
I think this can be prettified for a better workflow. At the very least, it should have a link back to the question it came from and/or the main site, and preferrably not just throw you to a page with a couple of lines of text but in the main site's layout.