The number of members to a Team will now be increased to 10 000 members. According to the message center, this feature will be rolled out by the end of May.
The other feature is something that was announced at Microsoft Ignite 2019. The ability to pop-out a chat or a meeting and move it around. Making it possible to work in Teams at the same time you are in a meeting, is a great addition to the tool and will increase the collaboration capabilities as the application is no longer "locked" to the meeting you are attending. This feature should be available to most by the end of May as well.
None of these features requires and action by the Admin.