(the following is based on my subjective experience through my guild internal rofl runs)
TL;DR
The patch was particularly fine, but turned the mage balancing in the wrong direction. This may result into a huge mage nerf, that should have been prevented by adapting the classes on the right way. Now we got a new mage meta.
Quote from Patch Notes 10.4.1.1002
First, thanks for the Scout/Warlock nerf, that was needed. I very much appreciate listening to us in that topic. 
Also it's nice to see a champ buff again, since warrior was overperforming over champ a bit. Now the champ will be much better by far, but we're already used to the 2-weeks-rotation of strongest classes, so thats okay to me.
Unfortunately there was no tank related adaption, which feels a bit sad, but okay, there are other classes having a higher prio I guess. 
The druid/mage and druid/warlock are btw still lacking in singletarget and are very strong in AoE, nothing changed for them. So maybe the adaption could be rated as useless, but we will see what may come in the next days.
BUT what the hell did you do with the mages? Mage/Druid and Mage/Rogue were alredy pretty imbalanced and now you just made them op. These two combos were (mostly) the best (magical) classes for AoE overall damage in rofl and now you just added a decent burst to them. Even the (still op) Warlock/Warden hasn't reached that damage level yet. By eliminating the only weakness of the classes, you created a real monster. 
But maybe this is intended, idk what you guys planned for the future.
I also don't understand why you're nerfing all the classes in one patch and 2 patches later bring out op classes again, that deal even more damage than already existing op classes (like wl/wd, wl/s, d/r, etc). Now we need a definition of classes that are above of op... maybe "op plus"? I mean, do you plan to nerf all classes again in 2 months? If yes, the changes should be fine, else I don't understand this at all (anymore). 
If I knew that you plan to introduce such op mages, I would have never complained about the Scout/Warlock, which now - post-patch - should be lacking in dps compared with the new/"op plus" classes.
I compared M/D today in rofl with my Wl/Wd and the AoE dmg was much higher and the single target sustain too. Only single target burst was still better on Wl/Wd, but overall M/D could have beaten Wl/Wd, but he died for 50% of the time and I was called 5 times at b3, so it was quite close in the overall dmg... 
Oh and hey, WlWd is still op, but M/D is a doubled WlWd (in terms of dps).
I mean, M/D is op as hell now, it's like the pre 10.4.0.4 M/Wd but now all the weaknesses are gone. Maybe add another passive that reduces incoming damage by 90% additionally? That would make the class complete, so it doesn't die anymore. (just trolling, please don't do that...you can't be sure these days I guess...)
In the end, I smell a huge mage nerf coming in 2-3 weeks, which makes primary mage useless again, but we're already prepared and used to that as well, since we still have the good old warlocks. Maybe a warlock raid makes sense then.
Also I would like to suggest again, to increase the aggro of Willpower Construct on Wl/Wd from 75% to 100%, the class is doing a great job so far as a tank (and seems to be one of the most viable tanks out there, bcz it prevents the raid of dying on big pulls) but is lacking in sustain aggro a bit. Especially if mages have more than 10% aggro, it's a bit difficult on some situations to keep aggro without stressing. 
With your selfbuffes, buff food, SW titles and Guitarr you are at 0.5^^ If you only have STorm Assault and no Fire Training you're at 0.54 (if I remeber correctly, I'm too lazy to check atm)