These are the only things I think may be different for the version I play. You're not guaranteed a job card every pull but will always get one on the 8th try, whether it's the one you want, well that's just the luck of the draw. If it's not you may have to do another 8 pulls for a guaranteed job card and even then it's still not guaranteed it'd be the one you want... There used to be a summon specifically to get job cards but they removed it last year and now it's just luck if you pull one
in the japanese version all major draws (6 tickets/3000 magicite) give 5 ability cards and 1 job card (with a small chance of getting an ultimate card and other bonuses like tickets for echo costumes/other sprites) each time. you keep duplicate ability cards, unless you set them to automatically sell in which case you get gil and revival tickets instead like you would selling them from the menu.
if you get a duplicate job card it gives you a 'limit level up' which levels up that job by 4 and gives you some bonus items like revival tickets or crystals, and 2x three stars (which i guess are called 'celestriad' instead). you can buy 'job exceeds' with three stars, but i always get a summon ticket instead. so at a certain point you do end up just getting the same job cards most of the time
i don't know why they would change that. i suppose getting new jobs each time you get a job card is a nice change, but at what cost, square!
also i spent a bunch of magicite upgrade my card boxes because i want to have one copy of every non-monster dropped card at hand even if i'm not going to use them.
i would also make sure you've got a bunch of mage-focused ability cards (and perhaps a good support ability for mages if you're like me and do 3 attack abilities and 1 support) because there will be points where you will need those in some of the later chapters. though which job you use at the beginning might depend more on what you have. when i was starting out i ended up using a mage a lot because i happened to draw a good mage job card.
also, if the weapons upgrading is available, i would probably focus on one weapon for each job type and keep upgrading that. e.g. my main warrior weapon is the masamune from the ffvii event (which has the 'reunion' auto-ability which sometimes gives you a number of rainbow elements equal to the ones you use for an ability, and by upgrading that weapon you can improve that ability or unlock new ones). the key is to find a weapon that's already good to start with.
which is why jobs with fully unlocked skill panels are good because you get their weapons at their max level without having to unlock them yourself.
(i think getting duplicate job cards might have also unlocked skill panels if you hadn't unlocked them? it's been a while since i got a new job that wasn't fully unlocked so i'm not sure now)
(why would you change that, square)