I have some sugestions about current 0.6 version:
1. Bad skyes and textures - even on the shot of the month sky is with color distorsions.
2. Camera /view/ distorsions - the walls arround looks like sphere twisted, more than with another engines.
If there any camera parameters to correct this, please someone tell me.
3. For now is not model loader from quake bsp - that is planned? Without this feature is very difficult to create real game levels.
Its good you are making suggestions to help with the improvement of Irrlicht. If you search though, I think some of these have already been suggested...
Have you seen in the "Project Announcements" forum? The FPS screenshots look amazing.
Thanks Saigumi, with appropriate values of fov the camera views can be improved.
Phreak, about textures my opinion is not changed at this time.
About model loader from quake map, I don't know - maybe Nico plans to code this feature?