Blizzard could turn it back to 1.1 and it would barely even affect how much damage I deal on my Priest right now.
I would lose 16 shadow spell damage and 5% wand damage, until next level when I got 5/5 Wand Spec again.
At our levels itemization and talent revamps didn’t have as much of an impact as some people like to suggest.
Especially the itemization if you aren’t 60.
I honestly doubt that 100% authentic 1.1 would even kill spellcleave to level in dungeons. At best, it’d make it slightly slower.