Right now the URL always shows crm.domain.com/main.aspx#12345678.

It would be good if instead the URL would change constantly and reflect a direct link to the current page (e.g. a record or an entity overview of a view, etc.)

That way a user could easily copy a link by clicking into the address bar and selecting CTRL+C. This would be an even better solution that bringing back the "copy a link" because for users that have never used CRM 2013, they intuitively expect that copying the URL will lead to a link to their current page, just like any other website.