As I was saying in the other thread, I finished marathoning 4A with a visiting friend, and she was interested in Will's story, so we ended up watching the first 3 episodes of "Wonderland" tonight.  Beware OUAT Wonderland spoilers below... 

I liked the first episode more upon rewatch than the first time.  I remember hating The Red Queen and Jafar's acting, and found it incredibly fake, especially their confrontation.  Their confrontational scene still wasn't that great (and the villain scenes in general dragged on too long), but I could buy it now knowing their full stories.  

"Wonderland" did such a better job with world exploration than 3A in terms of Neverland exploration, and definitely 3B with Oz.  I had forgotten  the characters visited so many interesting sites in Wonderland on their quest.  Another plus for the series was that the "heroes", especially Alice, were very resourceful and smart, clear from the first three episodes.

There were also way more character moments which felt meaningful, though I suppose some people could have gotten bored by the slower pace.  The flashbacks, especially in the first two episodes with Alice/Cyrus, felt very dream-like and ethereal.  My friend was a bit put-off by the violence, though, such as Jafar killing the villagers and the previous lamp owner in Episode 2 and then killing the Grendel in Episode 3.  She also commented that everyone has an accent, which could have turned some viewers off.

I actually thought watching "Wonderland" fit more after 4A (than 3A), since it seemed to provide a bit of payoff in seeing Will's backstory, and we actually got to see Robin Hood at work.  Plus that episode featured Maleficient as well.  I still think Will was a bit of a waste of time in 4A, but I would have accepted him as a lead-in to a spinoff like Wonderland... They could have had the Rabbit take him during "Heroes and Villains".