So... More things for people to RNG? Making it easier?
Not necessarily easier, depending on how it's done. If Game Freak actually gets their stuff together, they would be able to make RNGing pretty difficult. They don't seem to care all that much, though; it's pretty much been increasingly easier with each new game/gen.
Anyway, shiny shaking grass would be cool, though you'd have to worry about getting to it without encountering any other Pokemon, fighting any trainers, or hoping the trainers don't walk into the patch and ruin it for you.
NO MORE FUNERAL CAKE UNTIL I CAN BE A GOOD GIRL do you wanna die or just come real close?