[Admins]

I don't see any sense in making built-in signs or baddies, when they are well scripted they don't take a lot of cpu time anyway. We are working on new default baddy npc scripts which can then be used by playerworlds.
Offline-scripting has not been possible for 5 years now. Yes you can test some simple playertouchsme-showimgs things, but emulating a complete npcserver requires a complete npcserver and at the end it will be the same like working on your online server. It is already much easier to script online, and there are enough development servers online. We are also working on making renting a playerworld space simplier, as easy as it is to upgrade an account.
Spending resources on an offline editor would be a step back for me, it is more interesting to work on letting more people get access to the online scripting and online level editing.

About error messages like missing functions: there are options to turn them off / redirect them to file (logscripterrorstofile=true)

About editing scripts: now that RC2 is officially released you can see the scripts with syntax highlighting and line numbers. When you edit Weapons/GUI scripts, NPCs, classes and ganis then their script is immediatelly updated and sent to the clients so you can test things without restarting anything.