I'm also bothered that the primary impetus behind these efforts is from the "able disabled", the image of which is described by activists as the person independently navigating their way thru the world, making decisions about their life, forward thinking and forward moving. That's all well and good, but there is a very significant swath of the disabled population that isn't able to do all that, for reasons of physical and cognitive disability. They are truly fragile, and need our respect, compassion (not pity), and accommodation, as a society. I almost feel like this is offensive (mocking) to those people and their caregivers and families. This new image marginalized them, in favor of a view of highly "able" disabled, IMO.
I don't think a new advisory symbol is going to change anyone's ideas about the disabled.
It's like saying we have to get rid of the stick figure with a skirt signs that symbolize which restroom is a women's restroom, because some activist might be offended that not all women wear skirts all the time! And yes, I know there is a movement to get rid of those signs, too. My high schooler's school has three options: pink square, green square, blue square. (The new students and foreign exchange students have a hard time finding the restroom and deciding which one to use!)
It's a directional, advisory symbol. I don't think there is any advantage to changing it.