Craig, thank you for bringing these to our attention.
1. I have tested a couple of devices in the mobile interface, and I cannot replicate the issue with the CC field only taking numbers. I was successfully able to send a test email to different addresses. What device are you using?
2. This is more a feature request. It is already on our feature request list for further consideration by the devs.
3. I was able to replicate the problem with hyperlinks. It has been added to our bugs list.