who really needs such a meager toolset? nwn1/2 is way more powerful, and i am not talking about hair's breadth. even if there will be a toolset offering more customization, scl still has no skills, no feats, no pipeline for custom content, there's no dm mode as powerful as those we use.
Well, for me personally SCL toolset could be potentially attractive for two reasons:
1) The community is much larger, which means that the modules I make will be played by many people, while in NWN1/2 I am still yet to decide to start making my full scale module, since I am not sure anyone will play it.
2) It takes much less time to create something in such a simple toolset than in NWN1 and, especially, NWN2.
That said, they really need to introduce, at least, such essential functions as branching dialogues, basic scripting, custom companions, better area creation (even tile-by-tile wouldn't be enough for me, given how much I can customize outdoor areas in NWN2), ability to use custom assets (at the very least, custom music) and MUCH more complex character editor, before I decide to switch to it. I have some hope that it will happen, but there is also a chance that they will give up on it and just keep making working on an ugly cross-breed of World of Warcraft, Diablo and Baldur's Gate - in this case I am out. Probably won't even bother running through the official campaign, since it doesn't seem to be promising in terms of anything, that is miles better in some other game I've played.