Was with a group trying to get our Inferno garden keys, all omni. We kill Odqan first, only to be surprised by the next mission states we have to "Kill The Indomitable Chimera"
All the information that we had gathered stated that Ats'uks would be next in the progression, and that the Chimera didn't even appear in the Omni version.
The ARK we got when we petitioned was helpful when she informed us that her information showed that there had been no change to the quest, it was as it should be, there were no bugs, etc... She told us that "I suggest you make sure you're doing the right quests, it looks to me like you're missing some steps. "
This obviously does not mesh with what I and the rest of the team could figure out. We've asked others, looked at various guides, all say we did the quest correctly. What happened to the quest? We even tried doing the first part over, pulling the mission to kill Odqan that didn't give the box of nanocrystals as a reward, but same result.
The lesson learned? Never do anything expensive patch day.
Update: We went and got a Chimera pattern, and the pocketbosses needed proceed as normal after that one. Still not cool that this change was done under the radar/never noted.