Great performance and user experience remain a topmost priority for us. Application launch time has seen improvements in the recent build. We will continue making improvements across the product including channel to chat switching and overall resource consumption.
if you have an existing post that you want to show in a different channel, you can edit the message and cross-post. This will add the top-level post to the different channel, but will not include the full set of replies. We will keep this request in mind as we evolve the cross-posting feature in the future and update if the status changes.
Details on cross posting can be found here: https://support.office.com/article/cross-post-a-channel-conversation-in-teams-9c1252a3-67ef-498e-a7c1-dd7147b3d295.
As part of our commitment to being customer driven, we’d love your input on top features that will improve your satisfaction with teams and channels navigation, and help you be more productive in Teams. Please access the survey here: https://forms.office.com/Pages/ResponsePage.aspx?id=v4j5cvGGr0GRqy180BHbR7hW7rKdVrVInUSM809cvrtUNFhLRVNJVVhaUFI0WEJHVTA4MlpGWVZUSS4u
Thanks for your feedback!