We're all impatient to dig our hands in, but yeah -- the toolkit clearly isn't done yet. The NWN and NWN2 toolkits were far from perfect at launch (in fact, they continued to have strange bugs throughout) and Bioware as well as Obsidian had huge teams compared to Larian's.
Here's a thought regarding the scripting tutorial: I can't be the only one who was thinking "there must be a simpler way to do this". I am really hoping the choice was to take a roundabout attitude to scripting for instructive purposes. What is really to stop us from just running a simple inventory check (the command to do so is even shown to us!) when the dialogue triggers? I mean, sure, it may not be optimal in that huge scripts at the start of dialogues may cause unnecessary pauses, but the scripting engine can't be that slow.
Furthermore, inventory contents is bound to be a database in itself -- wouldn't it be practical to just use that database instead of creating tiny ones in a cumbersome script to do something that is done a thousand times throughout a campaign?