Main principles:
1. ...
2. ...
3. Minimum changes, only what actually increases gameplay variety
Maybe it would be more logical to determine the reward of conservatories and hives simply by the terrain type?
I'm getting tired of this eternal power stack grinding. Cons and hives are essentially the most desirable objects on the map, imbalance.
With 9-10 different bonus creatures from cons and hives, the imbalance will be greater. This was already gone through in TE. The first version of the script had random contents for cons and hives; it was only later that a paid pre-order was introduced.
That version was rejected precisely because of the increased role of native spawn points on respawn. Although variety would certainly increase.
Such a version might be acceptable only on a mirror.