YetaWF already offers replacable packages so customized features (including core services) can be implemented. We're moving towards an even more plug-and-play type pattern (like the new website startup, console startup, web api startup (web service) packages).
Removal of jQuery is a long term goal. All components and modules now use TypeScript without jQuery (however Kendo UI is jQuery based).
Remove use of bower - This continues to be used only by Telerik's Kendo UI.
Page load time/performance is always of high priority.