I must of been one of the few who wasn't disappointed by this show. I am a fan of Once Upon a Time as well. But I didn't approach the Wonderland version expecting another Once Upoin a Time. I expected a story that would stand on its own but still be true to the original. For example, it was a good mention in the series that The Mad Hatter had disappeared as everyone knows watch Once Upoin a Time he was stuck in Strory Brooke.
Also, I found that the actress who played Alice was great in the role. She made you feel for the character through out the run. I was kind of unhappy to see the show end to be honest, but I'm gald that it actually got a good satisfying ending, not all TV series do.