And who wrote only two clans?
Who chose to portray two clans the same way instead of writing another clan, or portraying them differently to give a more balanced reference?
We could encounter two Dalish clans in DA:O. Instead of creating a third clan in DA2, BioWare chose to bring back one of the two clans we've already seen and make them exactly as friendly as the last one, only less tolerant and less kind.
Dwarves have only two kingdoms remaining, and we've only visited one so far. Instead of making it so the one city we've seen is filled with mostly all unpleasant, xenophobic, standoffish isolationists that the protagonist cannot like, BioWare chose to make the many dwarves within the one city we've seen varied, friendly, etc. If they can make many different dwarves with many different viewpoints and levels of friendliness, tolerance, acceptance of strangers, etc. They can do the same for Dalish.
Except the Dwarves don't cling to the belief they were once immortal, all had magic and supposedly had this wonderful, Utopian society and the species they were subjected by took it away from them.
There can't be an over "appeal" at their humanity when if you are human you will always be a reminder of both their enslavement and their own self destructive war that saw their second homeland destroyed.
You cannot take all the bitterness, racial superiority undertones and glaze over it with pleasantness, Well you can in part via the Individual, but not the culture, its a mixed bag of jingoism and racial self loathing. Of course as i said its up to the individual, but i don't blame Bioware for casting a blanket over the issue, When you preach hate, superiority and isolationism, don't be surprised when folks ultimately don't care about you.