This is a great list. I agree with the item at the top of the list (Switch Case/Else-If) - I think that’s probably the most important ‘missing’ feature, from my point of view.
The FR with the most votes is probably the one for a Draggable/Sortable component. I expect you might say this wouldn’t be needed if your UI extensibility FR were implemented. However, I don’t think this would be a solution for most Wappler users - and would be quite complex to implement in any case. Also, it would be good to have a new component like this which would be very useful, as well as being more ‘fun’ than most items in the list.
The Custom Blocks FR would certainly be useful, but similar to the snippets request - which has a lot more votes (and would be more useful IMO).