Wait Mr. Tartakovsky was consulted for tips?
GENNDY NOTES
reads them

Truly a master.

So at the final sketchs, we can find:
*vision bait
*Lesser Lapis
*Steven going bald.
*Giant Gem/Small Body Steven
*Uncorrupted Centy('s outdated design?)
*Shoveldot
*Sadie and either Lars' earlier design, or someone else.
*Weird Steven thingie (Is that something you guys have there in USA?)
*Steven being strangled by… i don't know, Bacon Steven?
*Pregnant Vidalia (I think is her, but mostly because i am out of options)
*Also, way earlier in the third square, early design Garnet and… who?