The root problems remains, this isn't the first time the X-men books have been diverse but because the root problems remain around the issues are going to pop up again. So what are the root issues imo
1. Creative teams not being diverse
2. The line still revolves around white men and women in the important stories
3. It is pretty similar to number two but O5 is all white, Only Storm, Thunderbird and Sunfire are PoC from All new All different, Jim Lee era gave us Bishop and Jubilee. Pretty simply we only have three and half characters Bishop, Storm, Jubilee and Asian Betsy now Kwannon(I forgot Forge) who are grandfather in as "core characters". But there is an actually other group who fills this need and the X-men line is going to suffer with diversity issues because M, Sunspot, Synch, Karma, Warpath, Blink, Jubilee, Moonstar, Mondo and others are in this group. They are stuck in a werid limbo because the line refuse to age up some characters about 5 or 10 years.
Those are root problems, The X-men has been the poster child for diversity in comics for years, X-men smoke all other major players(Avengers and Justice League) in this area. The big problem looks like this the X-men look amazingly diverse now but time comes for the line to refresh and refocus so it doesn't get stale. The line resets and because the old problems exists the same issues pop up again. Some future probably white writer wants to put the X-men back in the mansion have Xavier, Magneto, Wolverine, Jean Grey, Cyclops and Storm be the center of everything and put together classic accidently mostly white team with excuse those are popular ones . That is the root problem the X-men always goes back to that.