Go over the "Extension Authoring" section of the Release Notes of the past year to see what can be adopted in the Go extension. Below are a few examples to begin with

June 2018

• Support the new Organize Imports code action if possible. This might help the case where users want to use the -s flag for formatting (which isn't supported by goimports/goreturns) as well as have the ability to manage the imports
• Provide all the refactoring commands via the new Refactor context menu if possible
• Explore if the new notification with cancel option for long running operations can be used for the "Cancel Tests" feature
• Update code to use the affectsConfiguration method on ConfigurationChangeEvent
• Language aware code folding

July 2018 and future

• Debug Adapter Protocol updates
• Investigate if the process event in the Debug Adapter Protocol can help in killing the ghost debug processes that remain after debugging is over
• Explore what it takes to adopt the Logpoints feature if at all possible
• Explore what needs to be done to get a good Live Share experience for Go