I feel you on the hardware my friend, I can not really run ue5 yet either. I hope to change that in the future, but ya for now ue4 is perfect for me.
Tactics was very different to the normal ff style of play, it was a big battle field where you commanded a large force vs enemy forces. Similar to the style of xcom if that is a better reference?
What I am taking from ff-tactics was there job system, which they did use in I believe ff4 or one of the early ff games, but it was expanded on in tactics.
basically you start as a basic unit, then you can job change and level that new job. As you get high enough you can retain learned skills from other jobs as you continue to unlock and change jobs. Ie. you could learn how to use 2h from the knight job, then learn how to duel wield from the ninja job, and then become a barbarian who can use a 2h in just 1 hand, combing those different job skills allowing you to duel wield 2h weapons. It is a really interesting way to add a lot of build potential and depth of choice.
In terms of combat I am going closer to other FF games, but without the ATB gauge. You get to use your full team on your turn. This means we can't use haste or slow type skills, but with controlling your full team it allows for combos and synergy to your builds. You can buff with 1 guy, debuff with another, and then attack with your juiced up dmg deal who was buffed. This allows for a lot of strategy in your team and battle turns, which will be very interesting when we have 1v1 pvp arenas.