I agree that all capabilities of the card should be reviewed, but there is a very important difference between reviewing what multiframe generation is and does for you, and simply claiming a card has 200+ FPS just because MFG is on.
You are probably well aware that frame generation is getting a lot of hate, which I feel like is partly unfair to it. However, Nvidia has used frame generation to tell outright lies about their products, most notably claiming that a 5070 is as powerful as a 4090. Its easy to hate something when it is being used to make dishonest statements like that.
I'm not a big fan of the popular term "fake frames" just because I feel like it is overly negative, but I do think it is important to make some kind of distinction between game engine frames and filler frames.