SSC/TK nerf was a joke right from the start.
I´d say what you want to see is impossible to get.
People have multiple accounts, and play in different guilds/gdkps.
Im currently fullclear on 2 pallys in 2 different Guilds, 1 mage, another guild, 1 Rogue, 1 Eleshaman 1 Warlock, and coming next week 1 feral druid.
If everyone of those 40% alga clears would be me, the average clear rate per player would be abismally low.
Sure, thats why IC and Mim HC which are required for Algalon are about the same kill % than algalon. Its the 1 hour timer 
The fact that you can not move Mimiron in P4 during his blast and especially during Barrage is not per default a nerf.
Given the amount of meeles dying in fire i see, its more of a buff, since it prevents me as a tank from repositioning the boss in a smart way.