Either dress uniforms, or possibility temporary field uniforms for more rugged assignments, used due to damage caused.I personally wave off the Cage look as temporary dress uniforms (hey, this is the same Starfleet that thought the TPM uniforms were a good idea) and the bridge a temporary bridge all in place for whatever that incident on Rigel VII was. The non canon comic books had it as a ceremony for Rigel VII joining the Federation, which would explain dress uniforms and maybe combat was involved that necessitated a temporary bridge setup/module while the real bridge was damaged.