Sidequest to try and find bring medicine to this guy who are very sick.
But really though, I want to have you be able to spend more time helping random people out in the slums – especially once you meet up with Aerith, before you're start getting lured off to Wall Market. On top of that, getting to spend time on the plate, so that you get acquainted with the Slums, as well as feeling the differentiation in what life is like above and below. Start to feel WHY Barret is driven and that his collateral damage view is believable, but Tifa's misgivings are still significantly valid. You should feel the struggles of everyone, so that the act of dropping the sector is just so UNFATHOMABLY EVIL beyond the pulls of the "necessary" ends-justify-the-means struggle you'd been facing that it utterly obliterates the scope of what you've been doing – even with the full scale of an explorable Midgar.
This is how and where I want to expand things the most, but I think that even the process of breaking in to the ShinRa HQ could be expanded. When you see Cloud running through in the trailer, you can see that there are regular employees working there in the backgrounds. I want it to feel like ShinRa has all of the machinations of a massive corporation, but that so many people there just have regular jobs and you don't want to interfere with them, but also feel completely fine to go in guns blazing once you get to Hojo. That area has a lot of misc puzzles and things that are likely to be adapted into some sort of experience that's more than just content padding from the OG.
That will also help to inform what it's like when you have to go escape the HQ and also try to get out of Midgar completely, which has plenty of layers that it can expand upon – especially since that's when you'd be likely to be bringing Nanaki in to the mix, and there're a lot of interesting things you might be able to do with him.
Related: Just seeing how they deal with Nanaki & ladders is gonna be interesting in and of itself.
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