Right, like Pelinal was supposedly an avatar of Shezzar or whatnot. The avatars are presumably fully aware of what they are, yes?---are they consciously controlled by the Aedra? *Are* they they Aedra?
The physical manifestations of the aedra, their avatars, are wholly aware they're aedra. As for Shor's avatars, yes, and you can look at his dialog from Pelinal to see. Also, the avatars ARE the aedra, just in a physical manifestation. They can't do much, save for Shor who seems to forget he's dead at times, as they're still pretty weakened, and require the powers of heroes to do something.
And how does someone like Morihaus come about, anyway, if the Aedra are planets? He was the son of Kynareth, yes? Who was the father? How does a dead planet give birth to a living thing? What does it mean, then, for Morihaus to be semi-divine in that fashion?
Someone like Morihaus had a divine parent. He's divine, but not wholly divine, demi-god if you will and did eventually die. And how does a planet give birth to something? Ask the dead body of Reman I, his mother is Nirn! Literally! When it comes to divinity in this sort of fashion, it usually means this person is going to be doing BIG things, and it's very uncommon. What we know in real life doesn't really apply to TES.
Oh, and the aedra are not completely dead, just mostly dead. Think of their condition as giving an arm or a leg to create a person. Some gave more of their body parts than others, and some donated their whole body (Earthbones)
EDIT: Here's the line about Hrol making love to the hillock, and Reman I's birth:
Hrol and his shieldthane were the only ones to find her, and the king spoke to her, saying, I love you sweet Aless, sweet wife of Shor and of Auri-el and the Sacred Bull, and would render this land alive again, not through pain but through a return to the dragon-fires of covenant, to join east and west and throw off all ruin. And the shieldthane bore witness to the spirit opening naked to his king, carving on a nearby rock the words AND HROL DID LOVE UNTO A HILLOCK before dying in the sight of their union.
When the fifteen other knights found King Hrol, they saw him dead after his labors against a mound of mud. And they parted each in their way, and some went mad, and the two that returned to their homeland beyond Twil would say nothing of Hrol, and acted ashamed for him.
But after nine months that mound of mud became as a small mountain, and there were whispers among the shepherds and bulls. A small community of believers gathered around that growing hill during the days of its first churning, and they were the first to name it the Golden Hill, Sancre Tor. And it was the shepherdess Sed-Yenna who dared climb the hill when she heard his first cry, and at its peak she saw what it had yielded, an infant she named Reman, which is "Light of Man."
And in the child's forehead was the Chim-el Adabal, alive with the dragon-fires of yore and divine promise, and none dared obstruct Sed-Yenna when she climbed the steps of White-Gold Tower to place the babe Reman on his Throne, where he spoke as an advlt, saying I AM CYRODIIL COME.