This is something else that seems like a bit of an after thought... I'm going to predict this won't be voted up as a tiny minority of Vault users will ever use this area of the software, but it's rubbish and needs improving, so here goes:
1) A GUI for editing the email template is required. The email sent out by notification is extremely user unfriendly, unsightly, unprofessional and it would make the world of difference if this could be editable. I don't mean an Autodesk controlled level of customisation either, I mean provide full HTML editing capability with the option of including property information and hyperlink control.
2) When adding additional recipients into the email notification, this needs to reference active directory. There's no reason why it can't. When I want to add someone within my organisation to the email list, I shouldn't have to type in their full email address "someone@mycompany.com".
3) A tick box option to control whether or not an email is sent on a specific ECO transition, rather than a black & white it's on or off setting which is currently how it works. Most people only give a toot about the ECO being raised, they don't really need to be told every time it moves from one state to the next. I get that this is to prompt someone that work is to be done, but more flexibility would be nice.