I'm not sure now, but I think that default setups are the same for all tracks in every car. That's why for most tracks gear ratios are bad.
That was their plan from the beginning, to make a game completely open for modding which is great IMO. There are already some great mods in the W.I.P. stage and modding tools aren't released yet. Speaking of other apps "Tyre Temperatures and more" is very useful. Even if we don't have anything under "and more", just the tire temperatures