The asari should be portraiyed as the one on the bachelor party on ME2: Amorfous creatures that appearance is dependent upon what the observer finds attractive.
Put that along with the arguably mind violating habits of Asari and you really start to make them sound pretty creepy.
Like creepy mind violating aliens potentially. But we know that Asari are entirely capable of compassion. That's good. That's not the focus here. Asari should be entirely able to be expressive of a full range of emotions. I'm not asking, nor would I want them to be "monsters" in the sense of the word.
But Asari mind melds are somewhat downplayed and made to seem.. enticing... and enjoyable, which seems to be the case observed so far.
But then again, we know that Asari are capable of forceful melds (ME1 Matriarch Benezia and the Rachni queen)
I'm not sure if that's the best approach, but if it were taken, it would certainly make them feel alien, accomplishing exactly what I had intended. I just favored Asari as they are now, with mind meld stuff intact, but with a slightly different and more uncanny appearance to push the player away from thinking they look attractive in the same ways that human characters might.
I want Asari to be beautiful in their own alien way, much like DA2's elves and darkspawn.