Your reading and comprehension skils are awfull, did you stop halfway?
My issue is that these addons brought Quality of Life (QoL) for guid leadership and are not giving any advantage over the pre-stonage way of dealing with such fights. Instead of me having to draw something up before every raid depending on my roster, I could put it in the addon, send it and be done in 30 seconds. It feels like going back to the stone age. It is merely a shift of unnecessary extra work to guild leadership which is fine in high-end guild since people put in like 14+ hours a day in Warcraft but is less appealing for softcore mythic raiding guilds who have less time to spend.
I honestly don't get the point. If they thought it was unfair advantage they should take a look at Weakaura's and disable the entire thing.
That addon has far more implications and advantages than Exorcis Raid Tools ever had on Kormrok/Archimonde/Iskar.