I have a suggestion for making FFXI's older events which were well designed and often beloved active again. I used to play a game called Phantasy Star Online, a game still talked about and loved today. Two things they did I think would work well with FFXI and already sometimes compatible with ideas in FFXI is C-Mode (which I'll get to later) and having harder difficulty settings for the same content, which as I said is applied to some content already such as BCNM's, Walk of Echoes Surge, and Incursion but would like to see it expanded to even things like Besieged, Skirmish, Meebles, Campaign and well all prior content at some point. Having a tier above VD even for BCNM at this point would be welcome, as with new gear from Riesenjima these engagements are much less difficult than they used to be.
The second thing is C-mode meant challenge mode and it was timed and given a rating of S,A,B,C etc for your clear time. It had different objectives though reused similar maps/content. One thing about it was it stripped you of all gear, levels, etc on entry and it took a well made team to win. Starting level was decided by the challenge and players started with extremely basic gear and spells and more could be found as they dropped from defeated enemies and drops were somewhat random making each run a unique experience, but it wasn't at the cost of making runs beatable or not for S-Rank based on if something dropped or not, it was well designed and just made you use your resources and strats carefully. Players could pick their team and enter in to defeat the game in a much more difficult state, because they were without the gear they had all worked so hard for. I will be honest not everyone enjoyed this, but the rewards made it enticing for many because you could get S-Rank weapons for clearing things with S Grade, and it was not easy to do so. It really made things a lot of fun for me again when they did that, and I think it'd be a popular thing to do as many FFXI players pride themselves on skill, and gear can make even priorly difficult things not take a lot of skill to win, I just think this is a good way for dev time to potentially be spent. I think the other nice thing about C-Mode is it would give players who still liked the 75 era game, or any level of the gameplay a chance to teamup and take on big challenges and could benefit the dev team and SE by reusing old content and setting levels for the battlefield/instance so is potentially cheaper to develop which also being fun to decide what gear could drop for the run and designing the time attack using the old content. For example Limbus could work very well this way. I think the C-Mode option is nice too in that there are not prerequisites for how geared or leveled your character is, so while it takes skilled players to clear with S ratings it is something anyone can hop in to.
Thank you for hearing my ideas, while everyone will not like any idea I hope it can be of use to you. I am really enjoying Reisenjima and the Aeonic questline and the difficulty some of these mobs present, it is the most fun I had in a very long time and I can hope that more very challenging content can be designed. I think it would bring alive a lot of content priorly worked very hard to create which is all but forgotten now, and would let people relive many old engagements in a way that is fun with friends and can still further their character with some enticing gear.