As the title says. Imagine if some good things that exist now, were made back then (pre-bb or so). I'll give some examples: Hyper Skills, lvl 60 3rd job + lvl 100 4th job, Reward Shop, Difficulty settings for bosses, RA (not cra, no party would be able to beat it), cubes from bosses, High item drop rates, starforce monsters (at a much lesser extent, no one could reach 70 stars back then ), Set Effects

In my opinion, these things if implemented back when I was much younger would have made the game MUCH better. Especially level 60 3rd job, as I once got stuck at 58 because it was so tedious to try and grind to level 70 for another advancement when training spots sucked. And it would motivate me to try to get to much higher levels to try hyper skills (albeit they would be much less flashy since nothing was back then).