We'z Speshul was updated much more recently than this patch, so the patch is probably outdated, and I've given up on supporting my Total War mods for the forseeable future. Development of UCfA for game 2 ceased years ago in any case.

Playing as Skarsnik

I only get 2 squig riders and 3 regular squigs even after building other squig buildings in other provinces, and there no cap for savage giants

Hi Vacuity how are you ? I just realised the generic squigs military building doesn't have any cap. Upon inspection, it's because the buildings from We'z Speshul ws_squigs_1 and ws_squigs_2 replace the vanilla wh_dlc06_grn_squigs_1 and they are absent from building_effects_junction_tables in this mod.
You might need to create a new cap for colossal squigs different from Skarsnik building for the generic one (+3 everywhere seems like a lot ? I don't know the balance of your mods like you do)
Thank you again for your work !

Thank you for your hard work!