Email still is 2-factor though it is easier to compromise, but I would recommend using the sms 2-factor if you can. Much safer.
You cannot think of email as 2FA. All it takes is a keylogger or virus to get your password and bye bye Bitcoins. Never rely on email for so-called 2FA!
You can. It still provides an extra layer. Plus, my 2-factor email goes to an address I only check on my phone so it's safe and completly unlinked to my computer.
Your phone is more secure than computer because they are not linked ? U must be a funny guy. Ur security is just awaiting to get broken... AMEN