At the end of the day it's a question of scope. One could make a whole game about just a single creature. I plan to revisit older TFs in the future and add more interactions to them so some of these things are planned.
For the more immediate future, Dr. Agon will revisit a fully transformed pig drone, and the pooltoy is planned both to access the packing machine and for scrap to be remade. But these things compete with incomplete VAC and steam vents, missing sounds, as well as their relation to major patches and more.