Depending on what biome you're building in, putting different activity centers in separate buildings can reduce the amount of raid defense you need. In fact, it could be made even more thematic, since you could make a small keep containing your respawn bed and comfort stuff, then build full raid defenses only for that building.

Just make sure there is plenty of space for raid mobs to path around the other buildings and they should generally be only threatened by normal biome mob activity which requires much less in defensive structures.

Overall it could be made to look quite thematic; with a central well defended keep surrounded by lesser defended buildings and plenty of open spaces/roads.