There's still much room for expansion but I'm not sure whether Civ 5 can handle it. It already takes ages to pass an AI turn on huge maps in late game and the AI itself is often lacking in basic wits. As for today, AI is often incapable of proper development of its land, establishing a reasonable religious expansion system and most importantly, waging a war. Further additions could cripple both AI and hardware even further. I'm already afraid that AI will not be capable of managing its trade routes properly.
If it's possible, I'd like to see one more expansion with:
- flexible borders (territory trading, peace-treaty territory adjustment, cultural influence making tiles flip)
- real religion (proper diplomatic modifiers, religious unrest, general reduction of unhappiness etc.)
- random factors (technology-related "inventions" and "events" like random great works of art, temporary tourism boost due to successful tv series, citizens start to fancy horse riding which results in bonus happiness from the resource etc. etc.)
- borders sparking tension in relation to international relations (real tension: decreased production, random sabotage of improvements OR bonus tourism, bonus culture, bonus commerce)
- tech and resource dependent development ("your trade routes generate only 50% of potential commerce because you have only 5/10 horses needed to properly maintain them all [or you could just invent cars]" or "construction of buildings in Berlin is at 66% efficiency because you have only 20/30 iron needed for your empire's development")
Now civilizations are internally static and I'd really love to see that changed.
If it's possible, I'd like to see one more expansion with:
- flexible borders (territory trading, peace-treaty territory adjustment, cultural influence making tiles flip)
- real religion (proper diplomatic modifiers, religious unrest, general reduction of unhappiness etc.)
- random factors (technology-related "inventions" and "events" like random great works of art, temporary tourism boost due to successful tv series, citizens start to fancy horse riding which results in bonus happiness from the resource etc. etc.)
- borders sparking tension in relation to international relations (real tension: decreased production, random sabotage of improvements OR bonus tourism, bonus culture, bonus commerce)
- tech and resource dependent development ("your trade routes generate only 50% of potential commerce because you have only 5/10 horses needed to properly maintain them all [or you could just invent cars]" or "construction of buildings in Berlin is at 66% efficiency because you have only 20/30 iron needed for your empire's development")
Now civilizations are internally static and I'd really love to see that changed.