Is the plan to add a method to discover additional relays for users to use? As a first touch point these warnings would be very confusing. 
Discussion
I'm thinking of having a button to purchase dedicated relays, if someone is providing a service to quick and easily spin up personal relays, I would love to have that added.
Think I should link users to https://nostr.info/relays/ ?
The "Deprecated Warning" is mock-up, and won't be shown to first-time users. It's to help clean up kind 3 relay lists, which I don't want to override automatically. I'll get this implemented now.
The "Direct Message relays" will also be automatic for first-time users. It's a compromise I made in NIP-17 support.
I implemented a check for both DM relays and deprecation warning.
This is how it will look for existing user's who have not cleaned up their following list yet:
One step is missing and that's auto-publish DM relay list on behalf of new accounts, I'll get that done later.
Regarding discovery of relays, could do something similar to Discovery Relay, where there is a button that will perform latency check for Discovery Relays.
Thanks for the feedback!