I like what the devs had to say on it:
That’s literally all I was hoping for with stealth nerfs: periods of vulnerability. She doesn’t really have that as long as stealth is permanent. 2 seconds of visibility with 5 seconds of invisibility (that you can no longer be knocked out of btw, so the speed buff can’t be interrupted either) is a good move imo.
In an ideal world, we would have stealth and translocator seperate again as well to allow for more skill expression and control of your character, but this is Overwatch we’re talking about here lol.