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Erdbeerbaer, you know, I've got Factorissimo1, Free Real Estate and Factorissimo2 installed.
The first one - because I use it since the beginning of my current world. It's for powerplants and for circuitry (more comfortable connections loyout for it than in FRE).
The second - FRE - is for smeltery. The best connections layout I've ever seen for my smelters setup. Plus the performance in comparision with F1 is pretty much better.
And the third, Factorissimo2. It's good to have bigger-sized factories, but the connections layout is not comfortable IMO, so I don't use it yet. Also ability to switch between input and output on the go is cool, especially for the energy flow.

So, it's true that F2 is more prefered by you, but not better for all, I believe.