Advice on using TNEW's "Create Account Brief" for email list sign-up

Given the issues inherent in maintaining both a web-subscribed WordFly email list and the lists we pull from Tessitura to use in WordFly, campaigns, we've decided to explore using the "Create Account Brief" page in TNEW as our email list sign-up page. Is anyone else here doing that, and can you share any tips?

Some of the concerns we have with this process:

• There is no "thank you for subscribing" page, they just get redirected to the events/calendar page (the ReturnURL parameter doesn't work on this page)
• There is no double opt-in (email link to confirm subscription)
• There is no "unsubscribe" or "no contact" option in the TNEW account settings if someone wants to be removed later (they can do this through the unsub link in WordFly mailings, however)

We can deal with or work around the above issues, but then there's this one: 

• TNEW documentation says they can use the same email address later to convert to a full account for purchases, BUT: 
• It's possible to disable the password requirement on Create Account Brief, which we would like to do (we don't want people to have to create a password for email sign-ups)

I'm not sure what to tell people who register using Create Account Brief how to log in later for ticket purchases. Since they will not have created a password, they can't just log in. But since they do have an account, trying to create a new one with the same email causes an error. It seems the only option is to give them a link to reset their password. No matter what, it's not the smoothest customer experience. 

Has anyone found a way around this, or solved any other issues with using this account creation option for email sign-up?