My prediction:
I have heard word that class roles might going under some change with support coming into play. Musketeer on its own probably is not going to specifically be a DD but a magic based weaponskill user/support class with heavy use of MP. Think Corsair's Wildfire from FFXI, But it is going to utilize MP more so than TP for Magic based weaponskills. Then think Redmages En-spells. Transitioning to RDM i think it will become more of a support caster some of the job specific spells will be, Phalanx, Haste, and the 50 ability most obviously Chainspells, as well as others. I think possibly RDMs most favorable cross class spells will be from Thaum and Conjurer. Corsair will be a support as well with some fashion of rolls.
So... I'm not saying the new gun class is going to be RDM, but it is going to be RDM.
EDIT: I wanted to add some supporting details here that are from another poster later in the thread.
[QUOTE]

Originally Posted by
Tupsi
He said it'll be something people won't expect meaning:
1. Goes back to him not playing XI and he ends up making Corsair again, because that's something no one would have expected when you mention "Gunner", because how many MMOs have a Gunner that's also an amazing support role?
2. He stated it'll be a Magic user, so not chemist, but will be a "mage".
It'd be easier if he just...told people about it. Hell we were getting info on Blue Mage and Corsair up to a year prior to it's release when they were showcasing ToAU expansion for XI, even if some of the main stuff they showed off we never got for Blue Mage, e.g Spider Web.

Originally Posted by
Tupsi
Would make sense if it was RDM though, since original FFXI Red Mage could also use guns and had marksmanship and heck one of the musketeer units (bastok army) were essentially Red Mages with guns.