Not to mention Venus managed to avoid having its infrastructure destroyed in the war and for 200 years of setting the whole operation was set up. The venus being terraformed is a plot thing overall, as Iso explained. 

I should note another guy claimed it would take tens of thousands of years to get rid of the atmosphere and restarting the rotation being near impossible. 

However, due to necessity the RP has to deviate from science at various points. 

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For instance with the high STL speeds used every spaceship becomes a potential WMD. What negates this potentially may well be that a good share of colonies aren't on the surface of a planet anymore, the amount of force a many ton spaceship moving at a fraction of the speed of light would be MASSIVE.

It's highly unlikely that there are many worlds orbiting alpha centauri beyond the one confirmed planet. For instance only one world has been confirmed around alpha while no worlds have been found it's not certain if luhman or proxima even have planets. Eridani gets a free pass due to being so bright detecting planets at Eridani is [i]hard[/i] to gleam at for worlds. The dusk disk not helping. However, I intentionally [due to wanting a zoo of different alien planets] added a diversity of alien worlds around the three star systems as to give more spots for people in extrasolar systems and shove in some of the strange exosolar planets scientists actually have found using Kepler.

Fast As Light is as plausible as Faster Than Light.

All three colonies manage to happen upon worm hole tech and all use it to go to sol despite different technological paths and cultures. 

There is seven planets, including europa and earth that have life [2 in eridani, 1 in luhman, and another 2 in the centuari multi-star system including the aforementioned tidally locked world]. It's not certain how common life actually is despite the wide potential range of places it may exist, however for the sake of the RP the commonness of life has been upped a bit intentionally. This is despite tempting the fermi-paradox, especially if intelligent life is found in one of the extrasolar star systems.

Beyond that, there are likely some unexpected implications of the tech we have. For instance FAL means you could in theory launch a missile at the speed of light.

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So I think what you should remember is that some things in the RP exist because they are, as Iso said, necessary to the plot. FAL and the gate ways are other examples of plot technologies. 

And that internal consistency is more important than realism overall.