I see Industrious as one of the culture reworks with highest potential to be fun. Some ideas to be added:
-a Davinci's winged flying unit tier 2, with a different name of course, the unit could be called Inventor and have a low damage attack causing distraction, if not racial unit to be possible then use this as inspiration to have summonable drones looking as mechanical bats
-a Davinci's Fighting Vechicle of Tank, maybe tier 4, it could fit industrious culture, but if cannons aren't wanted by devs this could be changed with ballistas, magic staves or cadapults instead. Another idea for this could be a circle of summoned shields similar to the ones of Giants, this tank of autonomous floating shields would be a single unit and be good at stunning enemies.
-Industrious could have a spell that makes the forging of the next item to have +1 infusion points
-two subcultures: 1)dwarf: focus on heavy armored units, physically sturdier 2)Egyptian: focus on more light armored units, magically blessed
-reuse the actual features of industious to be common on both subcultures
I think it could be interesting, even if half of things don't make the cut, industrious have one of the highest potential to be extremely fun and addicting.