Well, my point was, that you esentially nerfed the sh*t out of planet improvement facilities, by increasing their cost dramatically, it would be 'unfair' to leave easy to access, and extremely cheap system wide planet improving tech in the game for those who go with a certain racial tech area.
With the increased price, building multiple improvement buildings is most probably out of question, you'll be happy, if you manage to build just one, so the fact, that the nature shrines do not stack is not that big of a disadvantage.
Im not saying they should cost the same as regular tech facilities, but compared to the price of a simple value improvement plant I, even the nature shrine III can be considered 'free'.
FFS, the value impro plant III is more expensive than the arcology (with arcology being 350k iirc)

and even the arcologies have a build time, thats beyond reasonable (see my previous post about the 100-150 turn barrier).
Then again, im not the average proportions user, in my own games, i always mod your mod to some extent, for example by increasing the pop growth rate somewhat, modifying various building stats (recently, i've completely readjusted the colonial facilities of 3.0 to fit my taste, changed the way research facilities are spread on the tech tree, etc...)
Maybe i should stop posting stuff like that. Simply because my opinion is rather alone on the thread - havent seen too many Posts arguing with what i said - , and i feel it may be influencing you in a way, other Users of the mod may not like.
Lets just say, i'll stick to bug reporting, and will try not to come up with suggestions on how to make the mod better for my taste
A question: if you destroy a planet, will it end up as an asteroid field, or will it completely disappear?
csebal