This item remains on the backlog.
Thank you for your feedback. We’re happy to announce that an option to choose between Windows 10 Native Notifications and Teams Notifications is included in our Dec 2020 Public Preview pack, and will be available to users who opt into Public Preview.
You can learn more about the new Microsoft Teams Public Preview program here: https://aka.ms/TeamsPublicPreview, and Teams administrators can find documentation to manage which users will see the Public Preview option here: https://aka.ms/TeamsPublicPreviewAdmin
Adding any emoji as a reaction remains under review.
I am marking this as partially done to let you know a new reactions bar with Like, Heart, Laugh, Surprised, Sad, and Angry has begun rolling out to all users.
Group Calendar is a priority for the team, and the feature team is continuing work on it. You’ll start to see some incremental improvements. We look forward to sharing more details and timeframes soon.