I wish people would distinguish between what is actually in the Chant and the interpretation the Chantry puts on it. I stressed I like the morality of the Chant. By this I mean not harming those weaker than yourself just because you can, using magic for the good of society, etc. It makes me fume that the Chantry claims to follow the Chant of Light and yet the Chantry never seems to publically condemn nobles who commit atrocities and abuse their power but concentrates entirely on the activities of mages.
The Chant of Light is a collection of different sayings written down by her followers after Andraste's death and they do actually differ quite markedly at times. Some read like sayings and proverbs whereas others seem more lyrical and poetic, yet all are meant to have come from Andraste. The moment I was told in DAO that some bits had been dropped from the Chant due to political expediency (Shartan), it immediately made me wonder whether it was all genuine sayings of Andraste and what other bits might have been lost over the years. The original Inquisition was running around hunting mages, cults and heretics in the years between her death and the creation of the Chantry, so may be they edited it to suit their convenience.
I fail to see why Shartan wasn't a help to the elves. It was his initiative that led them to throw in their lot with Andraste's crusade. He died trying to defend her but her surviving followers did honour the agreement to give the elves a homeland. Without him as such a high profile disciple, would anyone have bothered about providing the elves with a homeland? I very much doubt it. After all they gave them very little assistance getting there. It was basically, we've honoured our agreement, the rest is up to you.
Also Shartan was not a mage. He and his people had suffered for years at the hands of mages. Was it so inexplicable that he would follow a religion that criticised their excesses? The Chant of Light does not condemn magic, it condemns the abuse of magic. It was the Inquisition and then the Chantry, 200 years after his death, that vilified magic and called it a curse. The Chant of Light specifically states that it is a gift of the Maker. "Vile and corrupt are they who have taken his gift and used it against his children." It is a condemnation of the Tevinter Magisters, not mages as a whole. The way in which the Dalish have viewed magic is entirely compatible with the Chant of Light.
As for the Maker abandoning humanity, well what about the Creators abandoning the elves in their hour of need, twice? The Dalish have come up with a convenient excuse for the failure assist Arlathan, they were tricked and locked away. Then they contradict themselves by saying that those elves who made it to the end of the Long March were rewarded by the Creators with a homeland. How did the Creators do that if they are locked away and unable to act? They also teach that if the elves remember what it is to be true elves, the Creators will return. Hard to do that if you are locked away. Then apparently after giving them this homeland and the elves faithfully adopting the old ways, even to the extent of antagonising their human neighbours, the Creators apparently let them lose it again.
The Chantry teach if everyone adopts the Chant of Light then the Maker will return. There doesn't seem much difference there, except that the Chantry have hamstringed us by removing versus from the Chant, so may be the Maker will not recognise the adoption of a truncated Chant. However, looking back to the time of Andraste, if the elves believed their gods were locked away and unable to act, why not adopt the faith of a god whose earthly representative had such success, particularly when they were opposing your oppressors and promised you a homeland? There was some definite agreement and debt of honour between Andraste and Shartan. That is why he is such an embarrassment to the Chantry.
Shartan was a significant historical figure. Honest Chantry scholars admit that without him intervening with his elven followers, Andraste and Maferath might well have lost the Battle of the Valarian Fields, in which case there would be no Chantry or Orlais and Tevinter would still be riding high. (I realise that some people think this would be a good thing because they think Tevinter is wonderful, slavery, blood magic sacrifices and all). Without his initiative and subsequent promises that he obtained regarding his people, the elves would never have been given the Dales. It is even possible to argue that had the elves adopted the faith of Shartan they would never have lost it again. Certainly if they had maintained better relations with their human neighbours they might not have made themselves such a target.
To be honest, I'm hoping Solas is going to be able to throw some light on all of this. That gap between the death of Shartan and the fall of the Dales, during which the Dalish culture was established is a period I would like to learn a great deal more. If I can learn more about Shartan himself, so much the better.