Water sources seems a good idea...
always if water is actually wet...
some unit could get some xp and learn to traverse shallow water, by swimming maybe.
A tanky knight should just drown on the other hand...
China had the Great wall?
Europe had Castle with water MOATS!
new unit, the WANDERER, can search for natural water seeps, get an initial well, instead of a STUPID ALTAR,
and maybe get some meaning of life in the meantime...
ROME was founded on a SACRED HOT, FRIZZY WATER spring, hence the secret, sacred name of ROME..
if 1UPT is to survive then AI needs to evolve WING commander formations tactics, scorpion tactics, and a WHOLE LOT MORE.
This will naturally alter the foremost semplicity which was given by a 2D map reading, and no need for AI formations.
Just point A to point B and IF there is impassable terrain (water) then you need a HARBOUR to produce transport ships.
1UPT AI will have to deal with the 1UPT complexity and static ships with no more move should still be able to embark or transfer, disembark, possibly DOUBLE the cargo capacity for each passing unit (LAND BRIDGE)
A Commander could add tactics, NOT BONUSES. To Air, Land, or Sea units.
Some sea ships suould basically LEARN to behave like LAND WORKERS that needs to build a ROAD... Sea WORKERS basically needs to get on the line between point A and point B and allow troops to move.
Sea, land, and Air bridges, spearheads AI TACTICS are needed because 1UPT is too fragile to break a chockepoint defence line (make Mountains PASSABLE will EASE the process!!! )Because it will always be 1 VS 1... so ONE strong unit can in theory STALL an entire PERSIAN WAR ELEPHANTS ADVANCE with one SPARTAN. (maybe some archers up a Mountain could EASE the path...)
This path design was taken AGES ago. When did Civ V come out?
What needs to be done is to GET RID of Civ V mechanics and MOVE ON.
But start from the BASICS.... a WWII scenario, an ancient Mesopothamia scenario, Middle age Japan...
at least 10 Basic scenarios... TLS Earth... and SIMPLICITY...
if the AI isn't SWIFT, there's something wrong... Simplicity means GAMEPLAY...
End game minimap and other embellishments are satisfactory and give a sense of rewards...
I've never heard gamers fatigue in finishing games prior to Civ V - VI. Never.