Passive hive defender bonus

Most clans cluster into groups called hives, this means resource seeing and helping on defend are quicker/easier, but it's otherwise of limited benefit.

I think a passive hive defender bonus should be added, whereby you get a small bonus to defense from neighbours in your clan. It could work something like:

1% for each clan mate within 1 tile,
0.5% for every clan member within 2 tiles
0.1% for every clan mate within 3 tiles.

This would add a level of strategy to clan location/structure, where perhaps weaker clan members are located in the centre of a hive. Or selfish leaders may locate themselves in the centre, etc...