My dissapointment in Elma possibly not being on the roster has been tempered, especially due to reminding myself I was a Ridley supporter lol. But I'm still gonna be upset, because having Elma wouldn't so much as be another "cool character a lot of people asked for" situation, but more of a vindication.
It's no secret that Xenoblade Chronicles X is the most hated of the current 3 Xeno games with a good portion of the fanbase. To this day there is still vitriol and contempt spurned torwards the spin-off, with some even having expressed smug happiness over the current news with Monolith admitting that an X port would be too "difficult" to make atm.
In spite of Elma's recent appearance in XC2 AND the fact that the sequel is still on the table(it might even be the next Xenoblade title), it hasn't changed the outlook on X being the redheaded, unwanted step child compared to its younger and older sibling games. Having Elma in Smash would have served as a great vindication for X fans, further proving to those who hated the game and think it should be forgotten as a stain upon the stellar record of the Xenoblade franchise, that Monolith doesn't think so. This, along with the X port, would've been great stepping stones torwards the sequel, but alas, we can only put up with more smug X hate until then. Heck, I bet some of them will feel vindicated over no Elma in Smash, and nothing against them, but it doesn't help that Rex/Pyra are considered a lock with DLC.
So yeah, what sucks about Elma not being in the game is mostly because it denies us our vindication./EndRant.