@Ryan_Miles and @CameronMoody - I have tested this. IMHO, it's not a good solution. It works, but it is not something I would like to roll out to clients. It's a workaround.
If you go to any other cloud provider on the planet, they let you register a domain name (e,g. example.com), and then when anyone logs in using that domain name, it triggers the SAML process. They don't make you go to magic domains.
The current process is not "Meraki Simple". Users should not need special training just to be able to log in. They should be able to type "meraki" into Google, see the login button, be able to click on the login button, and expect it to work. That is "Meraki Simple".
You can use Microsoft Office 365 as a specific example of how the login flow should work when using SAML.
ps. It would be nice to see FIDO2 and passkey support as well (for non-SAML Dashboard Access). The current MFA implementation (when not using SAML) is what I would describe as meeting the minimum industry standard. It would be good to be above the minimum accepted standard.