Remember how people complained that they left out Luna when compare too Celestia? Well she had her own spot light episode and two episodes helping out two of the main characters. Yes Celestia appear more, but other then when it comes season premiers and finals, she doesn't get a lot of focus.

Yeah, we need a Celestia focused episode. maybe about her past, or just about her day, or maybe some political stuff involving another pony/equine nation.