Planes is a Pixar movie so not counted technically, and Frozen is, well, Frozen! A global release of the same steelbook, for a brand new movie that smashed it at the box office and is the biggest selling film they've done! 
The others are all Zavvi UK exclusives (and very well done in the most part in my opinion)
I wouldn't call Aladdin new at 22 years old!
I really like the back artwork, fair enough it doesn't flow well from the front but I wouldn't want it changed especially as they might slap a charater from the front on it and be done like the earlier disney releases.. i love that they have used a full art on the back.. a big thumbs up to disney for trying to improve their steelbook designs as we have complained about blank slips, no gloss, random embossing, lazy back art etc etc.
I really like the back artwork, fair enough it doesn't flow well from the front but I wouldn't want it changed especially as they might slap a charater from the front on it and be done like the earlier disney releases.. i love that they have used a full art on the back.. a big thumbs up to disney for trying to improve their steelbook designs as we have complained about blank slips, no gloss, random embossing, lazy back art etc etc.
I also prefer a steelbook to flow from front to back, I am a fan of full artwork on the backs of steels though as I like to have the option to display them from either side, without a load of credits etc cluttering up the art. I really like the back of alice in wonderland for example (i agree with you that the colours flowing back and front is best) but having seen the back artwork for this I love it so I can live with the different colours. It would have been better if they'd managed to merge them some how, maybe with a border around the back art?? But I don't think that would have looked quite right either though?.. I dunno lol..
