These jobs didn't get any change in months, or even years if you count Jett and Beast Tammer, Twain Maple Story had a uptate that made some changes helping em, specially Jett, besides the really usefull Kanna and decent Hayato, Jett and Beast Tammer are really trash, Jett is trash for basically all lvs after lv30.
They need a uptate, Kanna need the Auras to not overlap infinity amount of times like today, make the Falling Sakura more usefull; sugestion from a friend: to make the Vanquisher's Charm hit more mobs and +1hit, and make the Hyper skill passive give only one hit, the skill is trash before you have points in it, make Orochi have attacks while on Cool Down like the other mages to make it more usefull in bosses, make a passive boost for Tengu Strike, the skill get very weak after 4job.
Beast Tammer need a lot too, she should be able to max all animals at lv140/200, and maybe use more than one at once, at leat at higher lvs, like using Hawk with the others, or make a mist of cat +the others, skills like the 1x1 Bear need to be togge on-off it still have a cool down like old skills had, yet all classes have it togge since pre-V patch, Hawk need either be usable with all others or a massive boost, she only have one skill.
Jett with the changes from TMS can be sorta vaiable, but problably still weak compared to all jobs who keep getting revamps after V-patch.
Hayato isn't that bad, not sure what could be made for him tought.
Overall they need changes, i don't know every single detail they need, i know people main these classes and can make far more sugestions to the class without making they overpowered, 5job skill of Jett and Beast Tammer is more like Hyper Skill than a 5job, maybe they could change it, still, these classes deserve more attention then they have right now specially in GMS, not even the small number of changes they made came here.