My son was also taking me to what it was he wanted until he recently started saying wanna eat or wanna drink, and open or help. He still hands me things he wants sometimes, and he won't point to something if I'm asking him to let me know what he wants, although he does point at things to tell me about them sometimes.
I also took videos, and examples of his drawings but it didn't make much difference sadly. I'm hoping that our repeat assessment right before he turns 3 will be more fruitful.
I wasn't very happy with the answers we got for DS4 at Lurie at the Pedi Psych dept so we're on a waiting list to get more testing done through their developmental specialist. Did you go through the developmental dept directly or through Psychiatry? The evaluation we're doing Thursday is through Advocate Mesonic Developmental Center so I'm keeping my fingers crossed!