No it will work just fine. The issue isnt that you dont have buildings, the issue is that your starting point is Haven, which for a 2nd age client, would not have buildings in Haven because Haven does not exist. What you are seeing is the doors only from the [gendoor command from RUNUO.
You would have to
1: Edit the starting point in charactercreation.cs to have new players to go Brit in Fel and not Trammel Haven
2: Delete all doors that dont need to be in the world.
3: Edit Moongates to not have Trammel as an option
4: Probably a ton of other things.