Not sure about the desktop clients because there isn't one available for my operating system. However, the web app is essentially unfit for purpose because I can't tell when anyone is trying to contact me unless I sit there, constantly staring at the app.

If you attach an item to a chat it will be saved in the files section of the channel. But if you are chatting about a document and you want to reference it you do not want to save it to the channel as it is already in another folder of the SP Site. To create a copy in the channel does not make sense as you are creating duplicates. a link would be the solution.

Imagine this chat conversation between two users:

Patrick : Sales is doing great now...
James : Yes but I wonder where we are growing?
Patrick: @Cortana Show me revenue by country in October 2016
Cortana: [Shows a graph with top selling countries with a link to the Power BI report]
James: @Cortana What product sells best in Sweden?
Cortana: [Answers with text] "Superduper Sport Shoe" has most revenue in Sweden for October 2016.

Now imagine adding in a bot that can answer questions about inventory or even a procurement bot...

This may technically be a bug but I'll add this anyway as a blanket item. The performance of the desktop client is just abysmal in my experience.

Clicking around constantly freezes the UI, and typing is painfully slow.

Hello, I have a question about MS Teams Guest Access. Is there any working on Guest acces to login-sign in MS teams planner or tasks?
Guest Accounts can see chat, folders etc but can not open planner tasks ?
Thanks.

Currently the Teams IP Phones are not useable cause in order to dial a call you have to use the onscreen keyboard to search for a contact to see presence or to dial the call. Teams IP Phones need to be able to place certain contacts on a speed dial tab that will show certain contacts and their presence status on one screen. You should be able to glance at the speed dial tab to quickly see who in your team is online and dial them.

Even if there won't be a modern UWP app for Teams, the Win32 app should be available through the Microsoft Store so it is discoverable by Windows 10 users (that's where I looked first, with no luck of course).

Show Metadata in the Files Tab to easily see, add and change metadata. (It seems that now you have do all that in Sharepoint)

on the settings there needs to be something for enterprise data retention. e.g. after 60 or 90 days data is purged off, or conversations roll off.

We have a number of users who are struggling with the font size the desktop app, be great if it could be adjusted. Its fine on the web app.

On the desktop we have translation but not on mobile. Please can this be added as a function ?

Please add the "No one" choice to the Meeting Options section, aka. The Lobby.

You should have a "what's changed" overlay everytime it updates, or at least a pinned topic on this page with a summary of the changelogs.
Given that it is a new product, some updates might include the missing feature that a team is waiting to switch over to Teams and it would be good to be able to discover this.

It would be really useful to copy a team with all Channels and files/tabs associated, this way we could create a template and copy it when creating new teams

Please add the ability to turn off the "check spelling as I type" feature in the Microsoft Teams Windows app. I use the web app instead of the Windows app simply because I cannot turn off this feature in the Windows app. My opinion is probably in the minority, but I find automatic, real-time spell checking (with the squiggly red lines) to be the most annoying feature ever implemented in any computer program -- even worse than "Clippy" the Windows paperclip help assistant.

It would be great that Teams could implement a real-time translation for conversations in a meeting and captioning feature like the Presentation Translator add-in for PowerPoint. This feature would be useful to have a Teams meeting with users in other countries.

During a Teams Live Event we can either take the TeamClients or a RTMP encoder as streaming source. It would be great to gain the ability to add SIP-endpoints or Skype Room system too.
Being able to stream from any SIP device is the missing puzzle piece in an already great interrop solution.
Imaging being able to use any video conferences room as Broadcast studio?

I`m sure this would empower the Interrop soloution offer by Polycom, Pexip and BlueJeans a lot.

Currently the only workaround is to use RTMP, but the workflow is to bad for the enduser.