+1 for drawing column integration with excalidraw, which is opensource and very powerful. The page embed is good, but not enough, as you need an excalidraw + account to store it.
I saw a tool that offered this and found it really practical.
Where can I insert my .excalidraw file so that it can be viewed on coda?
3 Likes
Absolute +1 for drawing object type / area feature 
4 Likes
+1!!! Drawing and diagram function in coda will seal the deal.
3 Likes
+1 im in (excalidraw ala)
6 Likes
+1 here as well 
This will be really usefull to us.