While i agree that Fujin is way more important than cotton/ney they will still be the most likely picks. They are way more useful in dupes than anything else so even if you already have one you likely want another. A second fujin isn't bad but rarely necessary outside of A3 and you can just use a friend lead to provide the second one anyway. Fujin is also quite old now and there are several other monsters with a similar active so a large portion of the players already has access to a fujin active and those are unlikely to vote for fujin (most people vote for what they want and not what is best for a minority thats why straight-up democracy sucks). Leader swap gfe has some chances but leader swap is over-rated right now. Its super duper strong in AltArena however in 99% of the dungeons stalling for it is too difficult and just not necessary to clear the dungeons right now. This may change in the future but in the status quo people would rather have cotton/ney to pump out the damage right from the start than pull of a 20 turn stall to change the board for a damage increase and easier activation for overkill cross leads. A good number of people also already have Li since everyone threw stones at DBDC and she wasn't super rare so that further reduces the chances for macha. I would buy a fujin in a heart beat if he becomes a choice, but i just don't see the chance that if there is only one gfe to be put in the mp shop he will be the one most people will choose.