OK, wishes, problems I found or things that puzzle me... Many of them maybe already in your todo list, and for sure YOU define your priorities 
All this in very random order...
- The configure button at 1st startup in the screen that asks for LDraw library does nothing for me.
- I'd like a shortcut and/or toolbar icon to enable/disable BFC view
- Open file seems to always start in LDForge folder. Should start in latest accessed folder imho...
- It seems that I can't open a file whose name or path contains accentuated characters (sorry, I'm French
- Cut and paste between two instances of LDForge? Cut / Copy to place LDraw lines as text to paste into external text mode application?
- Better shading?
- A way to control the split of quad into triangles? what about the inverse joining operation?
- I can create vertices - What can I do with them?
- Edit object applied to vertices start from 0,0,0 instead of vertices coordinates
- What's the rationale behind "radial" concept?
- At one time, LDforge stopped to display anything, I had to restart it to be able to use it again. More if I can reproduce this...
- Ctrl+drag or Alt+drag to pan? Middle button drag is not very comfortable (hurts my finger!)
- I was able to use external apps on my Win7 computer, but it doesn't seem to work on my XP box (nothing happens).
- When I select something in main view, I'd like that the text view jumps to first (or last) line of selection.
- In flat views, I'd like a reminder of axis directions (eg. labels -x, +x, -z, +z in view corners)
- Snapping on existing geometry?
...stopping here at the moment...
All this in very random order...- The configure button at 1st startup in the screen that asks for LDraw library does nothing for me.
- I'd like a shortcut and/or toolbar icon to enable/disable BFC view
- Open file seems to always start in LDForge folder. Should start in latest accessed folder imho...
- It seems that I can't open a file whose name or path contains accentuated characters (sorry, I'm French
- Cut and paste between two instances of LDForge? Cut / Copy to place LDraw lines as text to paste into external text mode application?
- Better shading?
- A way to control the split of quad into triangles? what about the inverse joining operation?
- I can create vertices - What can I do with them?
- Edit object applied to vertices start from 0,0,0 instead of vertices coordinates
- What's the rationale behind "radial" concept?
- At one time, LDforge stopped to display anything, I had to restart it to be able to use it again. More if I can reproduce this...
- Ctrl+drag or Alt+drag to pan? Middle button drag is not very comfortable (hurts my finger!)
- I was able to use external apps on my Win7 computer, but it doesn't seem to work on my XP box (nothing happens).
- When I select something in main view, I'd like that the text view jumps to first (or last) line of selection.
- In flat views, I'd like a reminder of axis directions (eg. labels -x, +x, -z, +z in view corners)
- Snapping on existing geometry?
...stopping here at the moment...