So far this is the highest I've managed to get when soloing:I'm maintank in our 25HM team and I'd be vengeancecapped at around 400k (800k hp) - and while we haven't cleared all that many heroics I can tell you that:
- megaera25hm barely gives me 280k vengeance (green head near the end) and more like 200k on average.
- ji-kun25hm barely gives me 200k even after 2nd talon rakes.
I don't think there's many, if any, raiding scenario where you'd be vengeance capped in a 25HM scenario, 400k vengeance is a lot.
You won't even notice a change for solo'ing, even including the hardest hitting things you can do.
LK25HM barely gives me 60~100k vengeance. Ultraxion ~80k etc.
This "nerf" feels aimed towards non-90s and maybe towards monks solo'ing / paladins solotanking, but it won't affect us DK at all.