@deavmi I have a full list of ongoing projects in the Gitlab project, but a quick rundown:

Present different features:
A redis-based queue handler that's fairly quicker than even the queuedaemons
Better exception handling that puts much more debug data information in the log for troubleshooting
The beginnings of a proper theme system based on Smarty
Reogranization of the plugins folder to seperate non-optional modules from optional plugins

Forthcoming:
The actual aforementioned theme system
A modern theme made using said I have prototyped
A web-based configuration system
API overhaul to make it much friendlier to mobile clients 
Debian and CentOS packages

Related side project:
@verius (whom also is helping with the webconfig and a few other things) is redeveloping Mustard to modern standards in his 'Custard' side project.