How would you go about remaking Ruby/Sapphire/Emerald

In what way? A lot of Pokemon and playstyles aren't viable with such a short duration on weather. Save for TTar, Hippowdon, and Mega Charizard Y, weather doesn't even exist in OU. When weather starters (TTar and Charizard) are the only viable abusers of their own weather, there's a problem.

I prefer weather being gimmicky over weather being the standard.
Weather wars were boring.