- Temperature locking : Right now you can't edit the temperatures, as those are simulation controlled. So you can expect some weirdness if you try. We'll have to see about a better way of handling that UI control, so it makes more sense. Also, if climate is enabled, it does not take into account impact heating, so the surface temps won't change. (That's a feature that needs to be implemented)
- Not Melting : I'll talk to Georg and see if we can get that fixed.
-Planets not loosing mass when sublimating/turning into giant comets at temperatures exceeding 3000 K
They are losing mass, but it's not enough for you to really see easily in relation to the mass of the entire body. On a smaller body, you should be able to see them losing mass.
-Bodies fragments a bit too big IMHO (I'm no scientist but some fragments just seem too big, especially when looking at their mass)
It's one of those counter intuitive things, but the smaller a body is, it actually has a lower density and therefore a larger radius. Large bodies are crushing in on themselves, and will compress the radius down based on their local gravity field. If you were to plot the radius of a body as you massed it up, you'd find it has some interesting bumps as it approaches those critical points. That said, it's something we've noticed here as well, and we're still mulling over how best to handle it.