I wanted to come in with some clarification as multiple specific issues are getting lumped together here.
There has been a general stutter issue (normal latency affecting dragonflight) that can be caused by a client issue that is being investigated. (No ETA on it though some folks have found relief in this thread with altering some settings in game. Some of the core issues are actually related to performance issues between nvidia and windows 11 that have been previously discussed and are being addressed with updates by both microsoft and nvidia. We too are working on our end to address the issues from this.
There are also some specific zone/area service issues that have been hitting very high pop realms since dragonflight launch that are also causing issues. Azure Span and Valdrakken being the two main ones. This is not the same issue as what was originally reported here though I can confirm our engineers are aware of both issues and are working on them from our end. There are specific threads for both of those issues atm.
Then there are those experiencing localized issues not related to either of these situations. It can be hard to determine if it is related to what I discussed above or if it’s something with the local system, client or network.
For those I recommend the normal troubleshooting steps of making sure windows and video drivers are up to date. Default the game client by clearing the cache, interface and wtf folders in the retail install directory. (This will remove addons) and shutting down other software while playing that is not needed for the game, system or connection to function. (Overlays, performance software, etc…)
Stuttering is not typically a connection issue but sometime rubberbanding can be confused with stuttering which is a connection issue. very similar in description sometimes but visually distinct. In cases of suspected rubberbanding, shutting down the system and network and powering off the modem/router for a few minutes is an easy step to clear out any bad connection data.
As for the Stutter issue specifically called out in this thread, it will likely take a combination of updates from microsoft, nvidia and our dev teams to fully knock it out. We will update this thread if we get any updates on the situation.