I think tbontob probably misunderstood what you were suggesting, although I don't know in what way? Maybe he is in a game where he started with 2,000 homeworld population, or he thought you were talking about a typical colony in your empire.
As for the changes list compared to 1.84, there is no complete list of all changes (unless you run a compare program on the data files...). As Dogscoff said, there is a good list on the Proportions web page (see link below), or in the readme.txt in your Proportions directory. The list of changes since the first Version of Proportions is pretty complete, though.
PvK