Adressing the problem of it taking 5minutes to get to a fight.
While I get that the long distance to a fight makes it harder to defend keeps (would be boring if people could just spawn inside one) , the walk time to get anywhere is rediculous. A railroad system would make it easier to get to things you already own. Make it destroyable by the enemy, so they could not only cut off supply lines but transportation lines as well. Maybe cost a few supply to build pre set tracks.
The style would obviously need to be updated to Guild Wars, as a 1900’s steamer would probably look out of place. Electro-carts or cabooses pulled by kittens, whatever.
My two cents.