Extreme Planets Colonization

Here is a new idea for modders.

Currently, the colony ships may colonize all the planets of the right type at the beginning of the game, even the ones wich have extreme temperature and radiation level. Would'nt it be better to permit colonization of only the planets that have moderate specs first, and increase the range of planets that can be colonized with increased colonization technology level?

Example:
At level 1 the rock colonization module would allow colonizing rock planets that have a temperature range +/- x% of the race homeworld. The same principle would also be used for the radiation level.

So as colony level increases: the colonizing module cargo capacity, temeprature range and radiation range would also increase.

That would permit to give a purpose to the temperature and radiation level parameters, add some reality to the game while increasing the fun factor!