Gun class we don't expect.. it might mean, the style have not appear in any FF games before. So need to expect the unexpected. I say, maybe it takes the role similar to the Commissar in Warhammer 40K. Makes your team perform better! By placing a gun beside their heads.
"Hey! Tank better!"
"Sorry Drg, you gtg, your DPS is kinda, *blam!* lacking... so let this be an example for all you ppl!"
"Bard, sing and dance for me *blam!* go on move your feet *blam!* higher! higher!