I involved a few more nodes than that. Some corrections done in linear space, some in log, some by lut to add some film simulation to give colors a push..
Same grading for all shots above.
I'm just a hobbyist with an interest in a lot of things, a pro would probably put hand to forehead.
*edit* I'm not saying simple is wrong ether, if all it takes is a slight adjustment, then that is the right one.