Oh yeah don't get me wrong, I think change.org as a product is hot stinky garbage. I don't take anything they produce seriously lol
I just don't expect them to do anything differently under the current circumstances is all heh. And their business is married to the design at this point, so I don't see them pivoting any time soon. As you suggest, they need a competitor that can do it right to come along and actually produce some kind of meaningful results in the political arena, but that's a whole other can of worms.
I literally have an idea for this, and am kinda just sitting on it until I find the right people. I've been on the lookout about 10 years now for a) someone with a comprehensive understanding of constitutional law and b) someone with a comprehensive understanding of political finance and lobbying, both of whom also need to be progressive and interested in 501(c)(3) work. A bit of a unicorn :p