Fizzer gave some sneak peaks already, I wanted to bundle them here:

Features:
- Custom scenario improvements (https://www.warzone.com/Forum/680977-custom-scenario-mod-compatibility)
- If you uncheck a template, it will stay unchecked even if it's voted out and then voted back in (https://www.warzone.com/Forum/681822-macedonia-split-out-quickmatch)
- Mega games will be able to use custom scenario's (https://www.warzone.com/Forum/682638-allow-50-player-games-members)

Bug fixes:
- Games with the option invite via code enabled while being a manual distribution game with custom scenario could not be joined by others

I probably missed some things, feel free to add below

Maybe he will fix that bug with swap picks mod.

if you mean the commanders not swapping, that has been fixed already

Try inviting a non-member to a game with a pick-swap mod while checking non-members can join off.

ah, didnt know that one existed

one thing that will likely be fixed is a small mod API bug, which will allow me to start working on the most advanced mod yet :D

I hope Fizzer releases premium green....

The biggest thing expected is the ladder rework