Proposal: Add to the city that work it +2 GPP of the same type.
Rationale: Add a specificity to the GPTIs which gives them consistency (for those who need it) and adds an opportunity to develop secondary cities by giving them more opportunity to specialize.
- For Citadel, use directly the bonus on Citadel
- When expending a Grand Admiral, add a Naval Base in the nearest city with the bonus (and upgrade it for each addition)
- When expending a Great Diplomat to create an Embassy, add a Consulate in the nearest city with the bonus (and upgrade it for each addition)
Rationale: Add a specificity to the GPTIs which gives them consistency (for those who need it) and adds an opportunity to develop secondary cities by giving them more opportunity to specialize.