Alternative Civ bonuses for Land/water

There are a bunch of civs that end up feeling incomplete over civ bonuses that rarely get to shine. Given how often these are related to water, I wanted to gauge thoughts on having two separate bonus profiles for land and water.

Ex.1 Vikings

Land:
Wheelbarrow/Handcart free
Infantry +20% hitpoints starting age2
*Palisades can be demolished to recover +50% of the cost

Water:
Warships cost -15%/-15%/-20% in the Feudal/Castle/Imperial Age.
*+2/4 LoS on Galley line and longboats and castle Feudal

Ex. 2 Saracens

Land:
Trading fee is 5%, Markets cost 75 wood
Camel units +25% hp
*Scout, foot archer, and spear lines return 33% of their cost on death

Water:
Transport Ships have double hit points and +20 carry capacity
Galleys attack 25% faster
*Fish traps cost -67%

*extra perks to fill the civ out.

How would you determine if a map is a land or water map? In what category would e.g. Swamp map fall?

Minimum would be Shoals, I guess.