Adam Wolff What specific concerns are there with Viva Engage? You don't need to roll that out to all users, you just need to ensure you do not block access to the service (they don't require any licensing to use Q&A) -> Manage Q&A in Teams meetings, webinars, and town halls - Microsoft Teams | Microsoft Learn
Brian Hoyt We are working on bringing producer support for TLE to the new Teams client.
Chul-Young I am not aware of issues specific to DDLs, have you opened a support case?
Janine_Barkley , DomW, rbell14 we're about 50% through the rollout of External Presenters, it should complete by end of this week. As stated above we're working on Producer support for TLE in new Teams. Known issues in the new Microsoft Teams desktop client - Microsoft Teams | Microsoft Learn
Janine_Barkley we currently do not support removing the response options when sent from the Teams calendar, this is under investigation. Organizers, Presenters and Attendees all use the same link to join; external presenters get their own unique link. You can use the Copy Join Link option in the upper right of the details page to get the join link, and send this from Outlook if desired. Today, as an event team member, you cannot also join as an attendee; this is a backlog item we have.
rbell14 NDI support is still being worked on for new Teams, you need to use classic Teams until then.