I'm not sure if he needs it, he's got his clones that he can send out everywhere, as we can see now, he can be everywhere at the same time.
but then again, if he can learn FTG his clones can put the markings all over de world in no time and his real body would be able to go anywhere he wants, he could even include the mark on his clones.
it would also be a good thing for the sage mode, he could make a clone, that clone FTG's himself to a secure location while the real one is fighting, gathers natural energy, FTG's back to the fight, dissapears, and voila, the real body is in sage mode, no reverse summonings needed the clone does it all by himself
so FTG would do something for naruto, but not in the same way as minato
but then again, if he can learn FTG his clones can put the markings all over de world in no time and his real body would be able to go anywhere he wants, he could even include the mark on his clones.
it would also be a good thing for the sage mode, he could make a clone, that clone FTG's himself to a secure location while the real one is fighting, gathers natural energy, FTG's back to the fight, dissapears, and voila, the real body is in sage mode, no reverse summonings needed the clone does it all by himself
so FTG would do something for naruto, but not in the same way as minato