Neither of those rides is at WDW, so I'm not sure what you are asking.
Most new rides, even coasters, are designed with alternate loading procedures for those with mobility issues. But again, as I wasn't talking about nor have I experienced either of those rides, I can't comment specifically on their ADA compliance.
As I said above, at WDW, there are really only two rides that are off-limits to those with mobility disabilities. These are Peter Pan and TTA. Both are because their ride systems are not meant to be safely stopped and restarted while passengers are aboard. They *can* be stopped in an emergency, but they were not designed to be stopped fully so those with disabilities may board (unlike, say, other rides that use moving walkways, like HM, SSE, etc.).
Peter Pan can be done if a) the person can walk a few steps or b) if the person can be carried by an able-bodied person. TTA is totally off limits to those in wheelchairs unless you can walk/stand up the escalator, get accross the moving platform, and seat yourself. I know Pan can get into creep mode, never experienced it on TTA but I am sure they have one as well, but because of the ride systems themselves they are not meant to be "safely" started and stopped with people aboard. I don't know if it's still true, but I know for a fact at one point if they had to stop Peter Pan that everyone needed to be manually evacuated (via Reedy Creek Fire Dept.) before the ride could be restarted.
So, if they ever did any major work on either of these rides, they would have to pretty much redesign the ride systems themselves to be in true ADA-compliance. That's why you aren't likely to see any major changes to these rides.