That's my thinking, simplify the bike, but keep the front derailleur to avoid the manual gear change.
The two-cog freewheel is interesting but I don't want to have to adjust the rear wheel to change gears. I've got a Fillmore and don't think I've flipped the wheel on it even once yet.
I've got a couple of old 10/12 speed roadbikes that I'm thinking of converting. If I get one converted and functional I'll probably flip the Fillmore wheel to the fixed side and leave it that way.
Just having fun playing with bikes and trying something a little different.