Because the Valar do not have to have a physical form at all if they don't want one, and making new ones only takes so long if they want the new ones to be humanoid and have senses and so forth. Delaying a Maia by destroying their physical form works fine; delaying a Vala like this really doesn't, unless the Vala for aesthetic reasons doesn't want to take physical form again until they can have a pretty one. Melkor doesn't have that aesthetic preference. 

That explains why he is now two walking fallout clouds. At least he is now sort of behaving himself, although Elspeth does not think he really took her argument as far as it deserved.

Yeah, the current situation does not seem good but if the Valar get involved the continent will crumble into the sea.

That would be bad. Why would that happen?

Melkor has magically invested himself into the ground. It makes him much weaker but also means that a magic contest with him would involve channeling lots of powerful magic into the ground.

Elspeth considers offering her services as a herald so an evacuation attempt would get better turnout than the last time the Valar tried to convince a bunch of people to go somewhere but unfortunately she doesn't work at all on Dwarves...

Dwarves are very confusing can she explain them any?

Dwarves are great! She doesn't personally love living among them but that's because she's kinda attached to broadcasting herself all the time, she thinks they're lovely. They do economics and understand incentives really well and are much less horrible than most people around here!

Why are most people horrible? The Valar tried to explain to them how to not be horrible.

...well, the Valar aren't that good at explaining things, but Elspeth hasn't actually had much luck explaining to people how not to be horrible, either, she kinda had to extort the evil king to get any ground given there, so it may not be a gap in understanding per se. They might just think they're more important than other people, or be frustrated or in pain and lashing out because their self-control or desire to exercise it has eroded, or rationalizing because they see no other way to meet their needs and goals...

Valinor had anything anyone needed! There was no need to be evil to achieve what you wanted!

Really? Anything? So all the unworthy dead, they're coming back any minute -?

Okay, but being evil wouldn't help with that anyway.

Well, yes, but people have coping mechanisms and some of them are evil. You can't just take people in pain and tell them to shut up because they live in paradise. This will only work some of the time.

And now that they're all super evil the Valar don't want to invite them to paradise.

Which kind of puts paid to the "how about living in paradise instead of being evil" strategy for morality management, so now anyone inclined to being evil may as well go nuts, because why not. Incentives!

People should want to not be evil for its own sake!

Well, sure. She agrees, even. But it's hard for some people more than others, and people cannot always do hard things.

So they should just go 'hello, evil King, you are free to move back to Valinor any time, maybe consider saying sorry for the boat massacre?'

That's probably not a great plan either. Sorry, just because Elspeth understands more things about what's going on doesn't mean she has all the answers.

Elspeth has been very helpful and shouldn't feel bad about not having a perfect solution! Only Eru has that and apparently he's not in the mood to talk!

That sounds very frustrating!

It was sweet of Elspeth to come explain incarnates anyway. Does she want anything?

She wants to go home. Or at least have a way to tell them she's all right, if her wolf's managed to hang on this long...

They can send her home! To right where she left from?