Please implement mounts that can hold more than one player character. Let players ride with their friends, or pick each other up and drive each other somewhere. Benefits include:
Big profits for Bioware, selling these on the Cartel Market.
Excellent guild perk, like a guild bus. Guild members can pick up a group of fellow members for a group quest or RP trip. Generates additional conquest participation if players know they can unlock carpool mounts.
Makes sense in-game, with many mounts already showing additional seats.
Perhaps sell a Carpool Permit in the Cartel Market that allows current mount owners to convert their old mounts to the new carpool version of the same mounts, including an account-wide version.
They should make the pig tradeable. It's so rare that it probably wouldn't cause much disruption if they did allow it to be traded or sold. Such a waste, for anyone who got one and didn't want it.