Restore Campign

Brenner and Ballista are still doable at uncapped levels, actually i seen videos about it still where people are using their Kannagi's and their Delve whatcha-ma-callits

Garrison is something ive done before but actually, thats still doable, see if you friends want to do it, im pretty sure people still have signal pearls (at least i still play with mine every so often)

Maybe they can make a Brenner II, Ballista II Garrison II like they do with every other thing in this game, or Neo Brenner Neo Ballista.
--but wait they don't allow gear changes or your penalized right?
=== Thats maybe why people stopped using it to start with====

Summery: They should probably remake a bunch of old timers events, but they are too busy dealing with IV and (yes i know its a different set of people but it still pulls some focus) making more and more gear to finish this current expansion.

Edit: Oh and still many people enjoy campaign but its not something thats easy to solo. Even if there are 10 mobs in a wave, hitting you for 20 dmg each thats 200 dmg a round, if your on a NIN lets say you dodge half thats still 100 a round, if your in a windurst area and your fighting NIN mobs your getting full of debuffs.

Why not pull mobs off to the side you ask? Got an answer for ya already.
Maybe you can get a few pulled off without links, but catch the NM and even a lv99 empy +2 healing breath macro set out delve polearmed DRG struggles with those NMs, as a lv85 RUN i was still getting hit for over 200 dmg by that in ptd-15% gear.