I am at AKL CL now and what you are describing is more closely aligned with the 11:30-3pm service where there is bread and hummus/ other dips, a salad of some kind (watermelon feta one day tabbouleh yesterday), make your own safari snacks which includes dried fruits, nuts, goldfish, etc., some kind of sweet bread or muffins, cookies and two soups (not sure if the butternut squash is vegetarian or not).
The evenings have large cheese trays and fruit and vegetable trays but the hot and plated apps have been more meat focused. If you like cheese then the cheese trays are quite nice. There was a plated mac and cheese dish but I didn't try it, so I don't know if it was vegetarian.
I would also think about how often you are going to be at the lounge. Since you can't as easily get to the parks from here, you may not be spending as much time in the lounge as you think. It is just DH and I, and we do breakfast every morning, and then usually hit one other service, maybe two since the parks close so early this time of year we tend to at least walk by the desserts but I don't like Disney desserts so they don't tempt me. Lately we have been leaving for the parks late due to the running events so we have been hitting breakfast and then right at 11:30 for lunch. It has been harder to get to the evening services. This is our laziest trip so we have done a lot more lounge time but it is at the expense of park time.
Personally, breakfast every morning and a few drinks makes it worth it to me because I like the added space of the lounge and anything else we are around to try is a bonus.
ETA: I have stayed at Poly CL, WL CL and AKL CL and I wouldn't say any was more vegetarian friendly than the other, but I do think that AKL CL has the most variety and number of options at each service making it more likely to find more things you can eat.