Is this kinda stuff possible, at all?
Reference columns with the above;
A-: Trait_1
B-: Trait_2
C-: Tech_1
D-: Tech_2
E-: UU
F-: UB
G-: Cities
H-: Flag
I-: Color
J-: Country
And since... Players are either Open/Closed/AI, Teams can't be any higher than 18 or that Difficulty levels "descriptions" would certainly fit in much smaller input text fields -- i don't see why the whole framework can't be adjusted to provide these new columns.
Inspired by your Civ-Customizer (3.13, only btw)... i'd rather have such options straight on the Custom-Game settings screen.

Reference columns with the above;
A-: Trait_1
B-: Trait_2
C-: Tech_1
D-: Tech_2
E-: UU
F-: UB
G-: Cities
H-: Flag
I-: Color
J-: Country
And since... Players are either Open/Closed/AI, Teams can't be any higher than 18 or that Difficulty levels "descriptions" would certainly fit in much smaller input text fields -- i don't see why the whole framework can't be adjusted to provide these new columns.
Inspired by your Civ-Customizer (3.13, only btw)... i'd rather have such options straight on the Custom-Game settings screen.