Oh... I just realized... Musketeer is going to be Orator as Job...

[Source]
New summoning ability available to certain jobs and classes after version 2.0.
New taming ability available to certain jobs and classes after version 2.0.
Release timing of the above abilities is to coincide with addition of new jobs and classes.
Summoned and tamed pets will not count as party members, and will develop over time. Release of a
"companion" system for these pet NPCs to fight alongside PCs.
Summoner is already here, taming however... Orator used Guns in tactics, as well as taming enemies (amongst other status effects). The glove fits. Very old information, I'll admit, but it's still the only hint about new Classes/Jobs we've got. Certainly fits Yoshidas comment about how it will be unexpected. So far all the Jobs have been FFIII/V era classics, Orator would be the first throwback to Tactics.