Bevendre

A lot of RD’s personality and character revolves around her being not only a pegasus, but one that is extremely proud of her abilities as a pegasus.  Flying is a HUGE part of her life, and taking that all away as a joke doesn’t sit well with me.  Fluttershy flies, but she’s more comfortable on the ground with her animals.  She’s afraid of heights.  Having her remain grounded isn’t nearly as much of a problem, and I think she’d take the change a lot better than Rainbow.