Now that we're talking about blocks, recently I've been thinking that one of the things that really distinguishes them from everything else in the storyboard is that some parts of them are needed for them to even work in an AA-like context. CEs, for instance, would not function properly without failure conversations. And while I have never made trials myself, I suppose one thing that is easily forgotten is to fill out elements like that. So why not remind the user about it? Maybe the tabs that are still empty could be marked with a red (!) icon or have a colour different from that of other tabs, or just somehow be distinguishable from other tabs -- simply to remind the user about their existence.