the motive of this poll is to use the info unveiled to falsely equalize his DF to enma and undermine luffy's efforts which is pretty deplorable .
let me put my answer in this manner .... luffy brought out the potential of the fruit making it this versatile ....while enma came with already exposed with innate hax..zoro didn't have to unlock its haki drawing attribute (no preemtve training).. enma came with it.. while luffy's Df didn't come with the gears and its potential unlocked ..so luffy made his DF surface these hax and techniques with his own muscle grease..and yet its a extreme physical toll over him every time he uses them whilst not lasting long and giving desired results like in his fight with kaido
well enma didn't require 2 years of training, it just rrequired zoro to be capable of wielding it and it was ...which enabled zoo to use its perks in exchange of his stamina but ultimately making it worth every shot by increasing his attacks potency drastically and mind you to the point where it imo even surpasses luffy's potency in ephemeral gear 4 form(strongest verision) and its reusable and zoro can recuperate in matter of seconds meaning the toll isn't that dramatic on zoro.
in a nutshell even tho luffy's DF is convenient and evasive and provides versatility but at the end of the day when met with an opponent of a higher caliber , even doffy, the fruit compromises alot of him and he ends up depending on others and luck to win a fight ..and it has been a consistent flaw .
while on the other hand enma has been a covinient tool of zoro to exert more of his haki and do exponentially more with minimal draw back ,just couple of huffs and he's back .
since enma didn't require mastering it , or any preemptive arduous training to wield its power that grants 1 perk which does wonders for his potency with minimal draw back when used excessively (that week of training is negligible and it was it get used to wielding the sword and getting used to its perk of drawing his haki so that argument is null), it jsut required him to be compatible with it for him to use its perks ..... it pretty safe to say enma has been doing wonders ...
and as substantiated a very good and convenient hax for zoro...so its the most hax when you consider the ramification to perk ratio and the required training to wield it ...which honestly was just a matter of getting use to .