We've begun migrating our users over to using the new GW Web over the legacy WebAccess. Some features we know are missing, such as signature and proxy support. However someone brought a new one to us today and it's a bit of a showstopper. They said they can't print an email, there's no printable view and pressing ctrl+p in the browser will not give a printable copy of an email. Sure enough, they are correct. You can't print an email from GW Web.
Not sure how hard it is to implement this, but it's something that needs to go on the list.