I've been playing a little bit of Galacticraft this week and am starting to enjoy the added functionality and learning curve of added machines and resources. I could be convinced to give a more featured mod a chance. My only concern is that the server would advance in pace and scale faster than a more vanilla world would, and we would be at a similar place as TinCow was with things not being much of a challenge anymore much more quickly. But that is a longer term concern and could be outweighed by the newfangled additions a good mod might bring.