Re: Planet class terraforming
I like the idea, but I think before something like this is implemented wed need more resource production increasers like Toxic Purifiers, or have the planetary types play more of a part in either the game as a whole, planetary production, or planetary defense. Otherwise something like this would only change the graphics.
Note the increases in bonuses for my terraformer ideas- both resources and planet sizes, along the same lines of Gaia terraformer, Mass Ice Melter, and Hyperterraformers.
Thinking about your defense and bonus suggestion, here's a few I thought up.
Barren planet = No bonuses whatsoever. Its a dead world, after all.
Volcanic planet = +25% defense, +10% building costs. Hard to invade a hellish world, but expensive to build structures to withstand the environment.
Metallic planet = +50% extra mining. Metals are already formed, or in extreme abundance.
Toxic planet = +50% defense, +25% building costs. More harsh than Volcanic planets as everything is toxic. Invaders have a hard time, plus toxin-proof buildings and self-sealed enviroments are expensive. Think CDC level clean and quarantine stuff.
Desert planet = No bonuses whatsoever. Its a hard world to live on.
Icy planet = +10% artifacts, +10% research, +10% building costs. You can discover hidden stuff under the ice, but buildings need efficient heating systems which costs a bit extra.
Oceanic planet = +20% population, +20% research, and +10% defense. More hospitable, which means you can fit more people in it. Also scientists can research marine life, plate tectonics pre-continents, and so on. Oceanic worlds don't leave much land to stage invasion forces on, and makes it easier for defenders to defend what they have.
Terran planet = +50% population, +25% research, +25% artifacts, and +25% defense. Terran worlds are ideal for life and dense cities, and the concentration of population centers allows for more universities and labs and pool of scientists. There could be alien artifacts laying around, or the industrial output of the planet allows artifacts to be built quicker. Defending terran worlds are of utmost priority, and plenty of land to defend in like mountains, swamps, tundra, etc.
Gaia planet = +75% population, +35% research, +35% artifacts, and +35% defense. Same reasons as Terran planets, but as Gaia's are basically better quality Terrans.
Exotic planet = +50% mining and +75% research. Exotics are wonderful for research purposes, it being an exotic and unusual planet. You also find strange and unusual metals, minerals, and resources on Exotic planets (exotic matter for example), so mining is boosted.
Dysons = +200% population, +50% research, +50% artifacts, and +100% defense. Dysons are the ultimate planet. Beyond massive internal space means vastly more living space than even the best Terrans. Dysons can house trillions easily. The nature of the Dysons lend to high research and artifact returns, from researching the Dyson itself, more space for research labs, artifacts found within the Dyson, industrial juggernaut able to mass produce special equipment (thus, artifacts). Defense is increased quite a lot due to the nature of the Dyson being a hard shell. You would have to break into the shell to invade the inside of the Dyson, and Dysons can have shells easily thousands of miles thick.
The bonuses apply to what you already have, instead of just an increment as with resource availablity bonus.
For example, a Terran with 1x Mega Rich and 5 level 4 structures. The structures give +20 research (+4 per building), then multiply by 200%, meaning 60 research. Then the 25% research bonus is stacked on that score, bringing it up to 75 research. then apply the colony status to that- a Peaked colony would have 150 research.