Actually I am hopeful that in some way we will be able to help the elves in the future in a lasting way.
Back in DAO none of the boons you earn as Warden seem to have a lasting effect. A mage Warden can ask for freedom for the Circle but it comes to nothing. A Dalish Warden gets an area given over to them (not entirely generous since it is down near Ostagar and therefore Blight ridden but it is something) but by the time you meet Alistair in DA2 it has apparently gone wrong. With the city elf boon even in the epilogue to DAO it seems to have come to naught.
In DA2 we have Anders banging on about mage freedom but no one seems to be doing anything particular about making life better for the elves. Averline doesn't even bother investigating properly an accusation of rape against one of her guards on an elf girl, until the elves take the law into their own hands. Upshot of this is that the elves join the Qun, which still has ramifications down the line in Trespasser.
Now in DAI no matter what you do, the mages finally get their freedom, even though the mage rebellion sold out to Tevinter. Regardless of any decision by the end of Trespasser there is a Circle for those who wish to remain loyal to the Chantry and a College of Enchanters for those who do not.
Yet despite their best efforts my elf Inquisitors really achieved very little on behalf of their people because events seem stacked against them and then Solas ensured that any residual good will was negated. Whatever might have been achieved through the choice of ruler in Orlais was effectively undone, since if you put Briala on the throne it had already been stated it only worked because of the influence of the elven Inquisitor and the Inquisition, so with power stripped away her days would be numbered, whilst Masked Empire had made it clear that Celene would backtrack on any concessions if she felt her position threatened by anti-elf sentiment.
What was noticeable though was even during the game, little respect seemed accorded efforts made by the Dalish to improve relations. When the clan made a peace offering over the information about Red Crossing, the reaction of the advisors was insulting to my Dalish Inquisitor. It was either a rather resentful, "if it means that much to you we'll do it" from Cullen, or stressing how much trouble it was going to cause her to get the noble in charge to agree from Josephine, or Leliana actually suggesting lying to the town about the nature of the gift so they would accept it. A similar thing happened in JoH when Leliana again seemed to advocate a cover up and appeasement of Ameridan's Dalish clan to keep them quiet. One reason I prefer Cassandra as Divine is that at least she says the truth should be known. Divine Leliana putting back the Canticle of Shartan was for me too little, too late.
The elves have not been entirely responsible for their situation, particularly those who have always been the underclass even under the Evanuris, and there have been elven heroes who have played an important positive role in history: Andraste would have died on the Valarian Fields but for Shartan; Orlais would have been overrun by barbarian Hordes and a dragon god but for Ameridan and it was the leadership of Garahel that brought so many factions together under him to end the 4th Blight. Only Orlais really suffered at the hands of the Dalish and the other nations have experienced Orlesian expansionism down the years, so it is hard to understand why they should have such a prejudice against elves, even with the Divine's approval. Mind you it is noticeable that the Dalish have a semi-permanent settlement up in Rivain but of course Rivain has never been wholly committed to the Chantry. I would imagine there are no alienages up their either.
Mind you, the appalling treatment of elves is actually contrary to the moral teaching of the Chant of Light, but then who in Thedas pays any attention to that?
So whilst I have no objection to the original concept of the downtrodden elves because it was an interesting variant on the normal elf scenario, particularly with the city elves, I would very much like the opportunity of improving their lot at some point in the future and it actually having a lasting effect. At present it seems if they want to improve their lot in life their choices are supporting either the Qun or Solas, neither of which are particularly appealing to me and thus my elven PCs, and either of which will likely end up with us killing large numbers of them.
There does seem to be an elf prejudice in players that is not very pleasant since I have even been insulted on these boards for playing an elf.