I really think that they should use the idea of Warfronts but with Chromie to retell the amazing larger scale battles of the warcraft universe. I really think the problem with warfronts is that WoW players in general only care about loot chasing because if it is not bettering your toon why should you care since everything is min/maxed to death ( look at the balance for most mythic raid fights for starters ). I contend that they should be used as the alliance raid system from FF14 to help give a leg up to returning players etc but the moment you add any player power to it most of the I ONLY PLAY WOW TO RAID people will bitch their asses off as they pretend they are on the same level as the best guilds. They will always be better so its not a bad thing to stop chasing and understand your limits.
WoW would be better served not giving a single shit to the raid or die players and instead focus more on everyone, if that means they only get a 7 or 8 boss raid instead of the 11 or 12 then all the better for it. More emerald nightmare less tomb.