I guess comparing FFXIV rdm and FFXI rdm isn't a good idea. Just look at the differences between 11 brd and 14 brd...
Moreover, ff14 gamesystem isn't as complicated as ff11, there is very few moments where switching gears is a msut (having an Extrem equipment set, and a coil equipment set for the accuracy cap is the only thing coming to mind...).

Rdm could really be anything, because it is a jack of all trade. And if I remember correctly, Yoshi-P did say MSK would be very different from what we could expect... so yeah, mage gunner could be inbound...