To be honest, I've no plans for doing this. I once looked into it and considered what you described as 'new and better' as an overcomplicated mess. LWJGL 2.x was simple in design. 3.x started to include everything that might even be remotely connected to game development and created a bloated mess IMHO. As long as 2.x still works on current operating systems, I feel no need to port it to 3.x. The LWJGL guys once stated that they were going to add something to make it more 2.x like for those who don't care about the details, but they never did as far as I know.
Edit: And the last time I checked, they had removed the AWT Canvas support without any replacement whatsoever.