World generation:
Biomes are nonsensely mixed around the world. Most of them are just different in stamina drain and maybe in the growth of some trees (no olives around me, but I'm not very sure). The only cool areas are swamps and maybe mountains when you reach higher exp*perc stats.
Why not making it a bit more real?

If biomes are scatered in a more logical way and plants and crops depend on it, specialization starts beeing a thing.
With this what the world gets is a dependance on trading and raiding. People from north shall trade or atack southern villages because they can't have acces to tropical woods or crops, for example.
In northern areas Kiwis cannot survive and pinetrees would die on southern or western areas.
In order to make things easier for caravans or merchants, a system like Ladygoo posted here could be useful. Railstations where called?
Also, and because seas and isles should exist in that world, overseas tradings take form.

-Int bonus
-I'm a bit lost with this people/no idea right now.

Actual haven. Northern dudes need coats and are damn good at it.
They can run faster on the north.
-Extra str
-Strong but slow weapons (bastard swords, longswords)
-Penalties in southern biomes
-Bonus in sieges/sea fight

-Excelent riders (turkish or mongol archers)
-Dex bonus
-Overseas penalties
-Masters of spices/food bonus

-Bad at thick clothes crafting.
-Penalties at northern areas
-Faster boats
-Better horses
-Faster swords but less damage (scimitars ie)
-Agi bonus
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-When the players spawn, in that whisp area, they can add their friends through the hs system and if they do, they can spawn in the same region. The spawning is random, so they can land in any part of the map and their friends will too. Then they can find each other by using the arrows, like now.
-Since the map wont probably be random, Jorb can unleash his skills and creativity to draw di... maps and make everything beautiful and nice.
-Each area can have his own structures:
*Greathalls @ north
*Ziggurats @ south?east?
*Mayan like Piramids@ west, or indian tippis or something like that.
*Asian type of structures @ east. ( Himeji castle ie)
With seas we can also have herrings.
This is just an idea and it needs a lot of work.
Its sunday morning and I'm sure I could build a real DeathStar if that means avoiding studing...lel I'm a lazy bastard