Looking at overall Damage and even 75th percentiles will show you nothing about why to bring a rogue right now.
You want a rogue in progress on nearly every boss (except maybe Coven, but fuck that boss):
Garothi boss for the soaks and high burst damage on the cannons
War Council (using Shuriken-Combo to dominate the boss damage charts)
Portal Keeper for the easy debuff transportation from portal to portal aswell as really good burst damage to the mini Portal-Bosses
Eonar is a mix between Shuriken-Combo abuse on priority targets in add waves and high burst damage on the Sentinax add
Argus, Kingaroth and Aggramar again you just melt the prority targets in intermission phases
On Felhounds, Imonar and Varimathras you could argue about the need to bring a rogue but even there you are just as valuable for mechanics and OKish dps as on the other bosses, which is why rogues are still highly represented on the rosters for all guilds.
As progress in mythic should be the focus for classes to shine on, you should not worry right now as every non-idiotic raidleader will gladly take you in for mythic kills.
As for HC raiders that want to be top dps for every fight in an already easy raid in which other classes can just cheese and pad the dps meters better than rogues and for players that are worried about later stages in this tier when the other classes will just scale way better than rogue, yes...you will not have a good time.
If you are worried about the bad scaling and the months after progress is over, where your dps and utility will mater less than it does now, you should start to reach out to blizzard like the other classes did after they got nerfed (i.e. Warrior) so blizzard will maybe do something about that (or not, but you tried at least)
(90th percentile Boss Damage charts for Antorus HC and Mythic, so you can see we are not that shit as you think in doing damage that matters) :
https://www.warcraftlogs.com/statist...metric=bossdps
https://www.warcraftlogs.com/statist...s&difficulty=4