We finally get to see a little more of the driving force behind this retelling as well as a little more of the transformation magic.
Perhaps I'm extra critical because Branagh is a Shakespeare and classics guy who should be well aware of layering, stories, use of symbology and plot points etc so I expect more than average but this trailer is definitely a step in the right direction, even if it still doesn't feel particularly innovative to me at this point. There does seem a chance that people will think slightly differently of Cinderella in the future though but we'll have to wait and see.
Note: Cinderella is going to be EVERYWHERE. The last few days have been filled with announcement upon announcement from various stores and chains collaborating with Disney to handle Cinderella-specific merchandise. You will not be able to escape this during Springtime. It's definitely being boosted by the new Frozen short, Frozen Fever, being included before the movie but the longevity of the Cinderella merch. will depend on a variety of things. Suffice it to say - if you want fairy tale themed clothes, accessories etc now is a good time to start looking around.
In the meantime, enjoy the trailer! It's worth watching to see where they're going with this: