I'd like to give props to Mathius for mentioning what I've heard before elsewhere as well, that the old platform is quite banged up from misuse and uncaring. They wouldn't want anything bad to happen, especially mind you with an open store directly underneath.
Give it some time, because there's a good chance they'll have to rebuild that whole tower sometime.
Personally, I never did the Rocket Jets at DL, but did the up high Orbiter at MK and have to say that after all these years, I sure wasn't missing much. Except fear. More fear than teacups. Or maybe it was just because it was nighttime and I just ate and it was the coldest night of the year for Orlando. It was bad enough watching the castle, Space Mountain, and the Contemporary zip before my eyes over and over to even bother to lift the shuttle up at all.