Those who remember the original game well may worry about the tiberium overunning the starting build spaces before bases are constructed to a level where it can be beaten back but, for some reason, and a little unfortunately given what tiberium is in the lore and how and why it's such a problem for humanity, tiberium seems to (re-)grow much more slowly than in the original game.
Edit: Now Tiberium growth can be changed without having to have a mod, though I disagree that having that set to 1 - which I assume was the level it was at before the patch that added it - is the same as in the original game as it seems so much slower, but either way that was a great addition to the game, but I've regardless kept this map up.