No. They haven't done one day passes for a long time.
Strictly speaking Otakon's price is for yearly membership with Otakorp, of which Otakon is their biggest meeting, and not an event pass to Otakon itself.
Next conventions: Anime Next, Otakon
Currently working on (commission): Compa (Hyperdimension Neptunia), Rover/Fran (Animal Crossing)
Currently working on (personal): Fem!Pacha (The Emperor's New Groove)