Java wouldn't bee too bad. At least it would be a dedicated application and external
Part of the problem is that the scripted ones also rely on an internet connection (and a fast one at that), which I rarely have at school.
The main reason I stopped paying them for gold/vip and a playerworld was because these tools ran horrifically slow on my school's network. Not worth the money if I can only sit back for a minute ever time I try to open an npc to place a tile.
The scripted tools really bite, they aren't the answer. We need real, native applications. I've had some requests to start developing again, and I would in a heartbeat, if I knew there would be some good dev tools I could use. But the last time I tried to use the Mac rc and level editor, it was terrible. Terrible enough for me to quit graal and leave Dark Rival (which I had worked on for over a year) to rot.