Fangames-only fag here. I've never actually played Platinum before, because the game was so easy that I got bored a few gyms in.
Does Renegade Platinum make the game actually challenging or is it just more of the same?

I don't really aim for perfect IVs on my mons but I do tend to use strong mons with good movepools and will catch wilds or breed mons until the nature is good if nothing else.