Molten damage seems static to me. It hurts - a lot. But I can deal with the consistency of it.
Reflect damage seems a bit wonky atm. I'll get a pack one time and go toe-2-toe (monk) with 3 or 4 of them and not have an issue. The next pack with one or 2 of them I get completely destroyed and have to kite the entire time unless I have Ascension up.
The only correlation I can seem to make (and this is a stretch) is that the faster the mob is - as in movement or the +Fast affix - the more damage I take from reflect. A pack of Burrowing Leapers w/ reflect roll me where as some charging cows in A2 really don't do much at all.
I don't doubt they are producing the correct damage values, but perhaps is there an issue with the rate they reflect or some other coefficient that's not behaving correctly?
I also noticed some back and forth with the RD for the first time today, though I think the differences I experienced weren't quite as distinct as your own.
I was actually able to use bears vs an RD pack today. I don't mean I was able to spam bears by any means, but bears came back into play. That was this morning, hopefully I will try again with similar success this evening.
if u see in the forums, 3-4 days ago blizzard said they were gonna lower down the MP. but it "wasnt oficial". once they did, they notice everyone was going on mp7+ whit barly no problem so my theory is that they just upgrade them to their original values.
so the damage you are taking is the same as it origginally was when this patch came, and the same u took on the PTR servers.
I think their may be some merit to this theory, personally.
It is true that on the 24th, all day long, folks were grinding at much higher mp levels than they previously were.
Perhaps Blizz did a whoops there, and decided to correct their mistakes without wanting to own up to it so soon after giving so many people a very happy day.
That patch was rather lame wasn't it ?
It seems mean to mess with our resists, if that is indeed the case, though.
This means that they would have to have either lied about the monster damage not being raised, or they would have to withhold the truth and possibly lie at some point about our resists being tampered with.
I'm not suggesting this is the case, but it wouldn't surprise me at this point.