My wife is legally blind and we went with our DD8 and DS4 in early November last year, about a month after the new program was unveiled.
Our greatest complaint was the one we anticipated before we arrived. With the GAC, my wife only had to explain her needs one time, when she initially received the card. Since the
DAS doesn't provide for visual impairment, we were put in a position of having to repeatedly explain her needs to multiple people. Because of a lack of experience, people are often baffled by someone who is legally blind but who can still see, if extremely limited.
The number one thing to do is to be polite and friendly. Before we left, we read here about all the training that CMs received and that may have been true for the DAS, but for disabilities that don't require the DAS, it was pretty clear no training was provided. Fortunately, the CMs were all wonderful and willing to provide assistance, even if that assistance was to pass us along to the next CM in line.
A few examples. We went to FOTLK at AK and asked for visually impaired seating near the front. We were asked if we had a DAS card. We had to explain they weren't given for visual disabilities, which the CM didn't know. When we got inside, they weren't sure where to seat us. We were moved several times, mostly because they kept putting us in seats meant for wheelchair companions (which are great seats, but it's not fair to take them when we don't have a wheelchair). We eventually ended in the front row, right behind wheelchair seating and had a great experience.
Similar issue at Fantasmic. They expected us to have a DAS card. When we didn't we were told to enter and talk with the person near the entrance with the red light. No further explanation. First, telling someone legally blind to look for a light is a problem in-and-of itself. Second, not telling them where to look besides "go that way" is a needle in a haystack proposition. Third, the description could have just as easily been "see the cast member with the long, bright flashlights." Then it would have been easier. Anyway, not knowing how far down to go, we had to ask 3-4 more people until we found a CM who knew what we were talking about. From there, we got seats with no problem.
I assume now, 3+ months in, that some of those kinks have been worked out. I wouldn't be surprised if there were others.