I've had a better level editor in plans since a while, but never got anywhere close to actually organising such a project... Such a project would require a few more than just one people, but it would be still fairly easy to do, as we know the J2T and J2L formats. Anyway, a JCS SE as I see (and call) it, would have got better animation control (a textbox rather than a lousy bar for animation speed, say), clearer event listing, easier documentation, simpler tileset creation process, lots of stuff in general...

anyone wants to take on?